£¨B£©1.—The Great Wall is one of the greatest _____ in the world.

—I agree  you.

A.wonder, with     B. wonders, with

C.wonderful, with

£¨C£©2.____students _____the discussion yesterday.

A.3 hundreds; joined

B.3 hundreds of; join in

C.Hundreds of; joined in

D.Hundreds of; joined