4．You and I could hardly work together，_____？（　　）

A．

could you

B．

couldn't I

C．

couldn't we

D．

could we

3．-How about my food？I ________ here for almost half an hour．
-I'm sorry，sir．It must be ready by now．（　　）

	A．	have been sitting		B．	am sitting
	C．	had been sitting		D．	was sitting

2．A new cinema ________ here．They hope to finish it next month．（　　）

A．

will be built

B．

is built

C．

has been built

D．

is being built

1．Different explanations are offered for America's weight problem--a problem increasingly shared by other countries．Almost one-fifth of American children and teenagers are overweight．
Schools have been urged to increase physical education，an important tool for public health．And many have．Yet now comes a study showing an increase in the number of injuries in"physical"class．Injuries increased 150% between 1997 and 2007．The study involved injuries treated in hospital emergency departments．Only 2% were serious．
The researchers did not try to identify the causes of the increase，but they have some theories．Lara McKenzie from Ohio State University was the lead researcher．She says one possibility is a decrease in the number of school nurses during the period they studied．For example，a 2004 study showed that the number of school nurses nationally failed to meet federal guidelines．Schools without a nurse on duty may be more likely to send an injured child to a hospital．
Another possible reason for more injuries is a change in the traditional idea of physical education．This"New P．E．"expands the kinds of sports that are taught．But activities that some schools offer now，like rock climbing walls and skateboarding，can also expand the risks，says Cheryl Richardson．She is with the National Association for Sport and Physical Education．Also，she says not all states require P．E．teachers to be specially trained．Untrained teachers could be less likely to recognize unsafe conditions．Cheryl Richardson also points to one of the study's findings--that injuries are often the result of contact with a person or a structure．This tells her that the teachers were not giving each student enough space to move around safely．
Six activities produced seventy percent of all injuries：running，basketball，football，volleyball，soccer and gymnastics．
The researchers say larger class sizes are another possible reason for the increase in injuries．Larger classes can mean less supervision．

57．The passage is mainly aboutB．
 A．different explanations for America's overweight
 B．the possibilities for the increasing number of injuries in P．E．classes
 C．The"New P．E．"offered in American schools
 D．the decrease of the number of American school nurses
58．What Cheryl Richardson says implies she is in favor of the idea thatD．
 A．the school injuries are not common in America
 B．P．E．teachers should be responsible for the school injuries
 C．school nurses are in great need in America
 D．all P．E．teachers should be specially trained
59．The P．E．activities that cause most of the school injuries areB．
 A．rock climbing，running，basketball，football，volleyball and soccer
 B．running，basketball，football，volleyball，soccer and gymnastics
 C．skateboarding，running，basketball，football，soccer and gymnastics
 D．skateboarding，rock climbing，high jump，basketball，football and volleyball
60．P．E．activities for large class sizes are more likely to cause injuries because_A．
 A．P．E．teachers have more difficulty taking care of every student
 B．students are more free to move around on campus
 C．students don't have enough space to have P．E．activities
 D．students have more spare time to spend alone．

20．The telephone _____ continually in the office all morning．（　　）

	A．	rings		B．	has been rung
	C．	has been ringing		D．	rang

19．____ she is young，she knows quite a lot．（　　）

A．

As

B．

However

C．

Unless

D．

Although

18．--Has Jack not come with you？
--Sorry，he _________ a novel recently．But he _________ here soon．（　　）

	A．	is writing； arrives		B．	has written； has arrived
	C．	has been writing； is arriving		D．	writes； will arrive

17．She had very little time even to see a film because all her time _______ the experiment，．（　　）

	A．	devote to do		B．	devoted to doing
	C．	devoting to do		D．	is devoted to doing

16．_________ made his parents worried．（　　）

	A．	The boy's being addicted to smoking．
	B．	The boy was addicted to smoking．
	C．	The boy addicted to smoking．
	D．	The boy's being addicted to smoke．

15．She watches TV _______ evening and changes channels（频道） ____ few minutes．（　　）

A．

in； every

B．

every； every

C．

every； each

D．

every； in