—How many birds can you see in the trees?—I can see birds in the trees.A. hundred ofB. fiv

问题补充：

—How many birds can you see in the trees?

—I can see birds in the trees.

A. hundred of

B. five hundreds

C. hundreds of

D. five hundreds of

答案：

A. hundred of

B. five hundreds

(答案→)C. hundreds of

D. five hundreds of

解析：句意：你能看到树上有多少只鸟？我能看到树上有上百只鸟。五百：five hundred，具体几百时，hundred后不能加s，成千上百的：hundreds of，表示数量多，并且是约数时，hundred后可以加s，故选C。