As there is less and less coal and oil,scientists are exploring new ways of making use of ________ energy, such as sunlight,wind and water for power and fuel．

A．primary

B．alternative

C．instant

D．unique

in our class, when the bell rang and the taacher closed his book, it was a ________ for everyone to stand up．

A．signal

B．chance

C．mark

D．measure

Hiking by oneself can be fun and good for health．It may also be good for ________ building．

A．respect

B．friendship

C．reputation

D．character

some parents are just too protective．They want to ________ their kids from every kind of danger, real or imagined．

A．spot

B．dismiss

C．shelter

D．distinguish

the loss has not yet been ________ accurately,but it is believed to be well beyond a hundred million dollars．

A．calculated

B．considered

C．completed

D．controlied

During the war there was a serious lack of food．It was not unusual that even the wealthy families had to ________ breaad for days．

A．calculated

B．considered

C．completed

D．controlied

Would you please ________ the paper for me and see if there are any obvious mistakes?

A．look around

B．look into

C．look up

D．look through

To make members of a team perform better, the trainer first of all has to know their ________ and weaknesses．

A．strengths

B．benefits

C．techniques

D．values

But for the help of my English teacher, I ________ the first prize in the English Writing Competition．

A．would not win

B．would not have won

C．would win

D．would have won

In April, 2009, President Hu inspected the warships in Qingdao, ________ the 60th anniversary of the founding of the PLA Navy．

A．marking

B．marked

C．having marked

D．being marked