A．be switched toB．be diverted intoC．be reverted toD．be converted to

The policemen were told to be alert（) the dangers they were facing.A toB inC onD at

Computers can be designed ______ many automation processes purposes.A．toB．inC．onD．for

The electronic games would not have______without being ingeniously programmed.A．taken toB．

Will you send her a note for me？______.A．I"d be glad toB．I don"t think soC．Yes, I willD．I

Its______the judge to decide whether her prison sentence should be reduced.A．close toB．up

____ forget to write back home as soon as you reach New York.A.Be sure toB.Not be sure