Two middle-aged passengers fell into the sea．________, neither of them could swim．

A．Similarly

B．Luckily

C．Unfortunately

D．Naturally

With the energy ________ less and less, people have to make every effort ________ new sources of energy．

A．became, to look for

B．becoming, to look for

C．becoming, looking for

D．become, looking for

For a moment nothing happened．Then ________ of the falling stones and soils．

A．noises had come

B．came noises

C．noises would come

D．did noises come

I can't ________ what has happened to the vegetables for they were freshly picked this morning．

A．look out

B．take out

C．go out

D．figure out

Drinking green tea is good for most people, ________ it is not proper for pregnant(怀孕的)women．

A．because

B．however

C．unless

D．while

The island, ________ to the mainland by a bridge, is easy to go to．

A．joining

B．to join

C．joined

D．having joined

From China Daily：Over the past three decades, more than 200 million Chinese ________ out of poverty．The average life expectancy ________ by 5 years．

A．has lifted; have increased

B．have lifted; have been increased

C．have been lifted; has increased

D．has been lifted; has been increased

________ of the rivers in that district ________ polluted．

A．Three fifth; is

B．Three fifth; are

C．Three fifths; is

D．Three fifths; are

From their ________ on the top of the TV tower, visitors can have a better view of the city．

A．stage

B．position

C．condition

D．situation

Dr．PeterSpence, ________ headmaster of the school, told us, “________ sixth of pupils here go on to study at Oxford and Cambridge．”

A．不填; A

B．不填; The

C．the; The

D．the; A