21．If you ____ your money ____ mine, we will have enough to buy one more set of stamps to ____ our collection.

A. join; in; add　　　　　　　 B. add; to; add to

C. put; to; add up　　　　　　 D. add; in; add up to

35. As we know, no matter how 　　　　a man is, if he doesn’t learn, he knows nothing.

　　 A. intelligent 　　 B. enthusiastic　　　 C. relaxed　　　　　 D. disappointed