It looked as if time hadn’t had any effect on him: he　　   so healthy and active.

A. remained　　　　　　　　　　　　　　 B. was remained

C. was remaining　　　　　　　　　　　　 D. had remained

Having a trip abroad is certainly good for the old couple, but it remains　　   whether they will enjoy it.

A. to see　　　　　　 B. to be seen　　    C. seeing　　　　    D. seen

　　   ，some famous scientists have the qualities of being both careful and careless.

A. Strangely enough　　　　　　　　    B. Enough strangely

C. Strange enough　　　　　　　　　　  D. Enough strange

There are too many difficulties for us　　   . We really don’t know　　   to do.

A. to deal with; how　　  B. to do with how

C. to deal with; what　　  D. to do with; what

How foolish it was________ you to believe________him!

A. for; on 　　　　    B. of; in 　　    C. /; / 　　　　　　　　  D. for; with

________ you’ve got the chance, you’d better make full use of it.

A. Since 　　　　　　　　　　 B. When 　　　　　　　　　　 C. For 　　　　　　　　 D. If

—Are these desks enough for you?

—No,________are needed.

A. three more 　　   B. more three 　　　　　　  C. three another     D. other three

Can you tell me________ 100 years from now on?

A. what the word will look 　　　　　　    B. what the world will look like

C. how the world will be like 　　　　　　 D. how will the world look

She still remembers the days __________ she was in the country __________ she was young.

A. as; that　　　　 　　　　　　　　　　　　　　　　　　    B. which; when

C. when; as　　　　 　　　　　　　　　　　　　　　　　　 D. during which; that

_________ you have any difficulty in getting tickets, ring this number.

A. If　　　　      B. Should　　　　　　　　　　 C. Must　　　　 D. Both A and B