( )6. They are engaged in the research and development of a device that will be capable of _____ enemy’s submarines at the deepest bottom of the sea.

A)finding

B) discovering

C) positioning

D)detecting

( )7. The flood fighters told the reporters that they could _____ in that they had nationwide supports.

A) hold out

B) put out www.examｗ.com

C) carry out

D)bring out

( )8. He could be _____ by the traffic jam or else he would have come to me by now.

A) left off

B) dropped out

C) got down

D)held up

( )10. Many businesses’ promotion campaigns _____ because they never fulfil what they have said in their ads.

A) pass away

B) get by

C) fall through

D)give away

 6. D 7. A 8. D 9. B 10. C