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________ where he is going.

A. Find

B. Search

C. Find out

D. Look for

All of the policemen went into the forest ________ the lost boy.

A. look for

B. find out

C. search

D. in search of

Will you try to ______ when the train will leave?

[    ]

　　A. find out   B. look for   C. search   D. search for

Would you please ________ the answer to this question?

　　A.find　　B.find out　　C.search D.look for