第一节：词汇和语法知识（每题1分，共20分）
21. As we know, success often comes after ______ failure; so don’t be so upset about _______ failure of this matter.
A. a; a B. 不填; the C. a; the D. 不填; a
22. We give dogs time, space, and love we can spare, and ____________, dogs give us their all.
A. in all B. in return C. in short D. in fact
23. In the office I never seem to have time until after 5:30 pm, _____ many people have gone home.
A. that B. which C. whose time D. by which time
24. Many of the people who would travel to the gold fields did not know they would face extremely hard work and terrible living conditions. This was Mr Smith.
