I made his __________ (结识) at a party held in honor of our new major.

Allow children the space to voice their opinions,　　 they are different from your own.

A、until　　 B、even if　 C、unless　　　 D、as though

I worked so late in the office last night that I hardly had time＿＿ the last bus.

　　A.catching   B.to catch   C.having caught   D.to have caught

— Could you help me carry the heavy box , young man ?
     — _______ .
    A. My favourite  B. With pleasure  

C. Your are right  D. Don’t worry

I______ the back door,but it was locked,too.

A.tried to open　　　　　　　　　　　 B.tried opening

C.managed to open　　　　　　　　　　 D.attempted opening

I like ________ history, for, by studying it, I can gain ________ knowledge of the past events.

A. /, a　　 B. /, /　　 C. the, a　 D. a, the

Mr. Paine made a ________ （请求；要求） that I should help him

I can hardly imagine Peter __________ across the Atlantic Ocean in five days.

　 A. sail　　　 B. to sail　　　　　 C. sailing　　　　　 D. to have sailed

To visit someone unexpectedly is to drop _________.

A. out   B. in    C. off     D. down

Animals in zoos are not in their natural s_________.