( )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 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

A) do away B) find fault C) come up D) fall in with

( )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