I got some letters．________of them is from my father．

A. Both B. None C. No D. All

Be quick! We have________ time to finish the work．

A. more B. fewer C. no D. less

Yancheng Nature Reserve is home _______ different kinds of plants and rare birds.

A. at B. to C. on D. in

The bad weather yesterday morning prevented all the planes _______ off.

A. to take B. take C. taking D. to taking

We went to watch a bird show in the wetlands _______ a rainy Sunday morning.

A. at B. in C. on D. /

He is very strong. He has _______ shoulders.

A. large B. big C. wide D. broad

There is not enough _______ for birds here because people build too many houses.

A. ground B. food C. area D. space

Tom is watching TV, ________ his father is busy working in the study.

A. after B. while C. before D. so

I heard your daughter ____________ in the next room at ten last night.

A. sang B. sing C. singing D. sings

You must clean the room every day _______ keep it as good as new.

A. in order as B. so that C. so to D. in order to