问题
选择题
| As we all know, ______ life is hard for any of us. If we want to live ______ happy life, we must work harder. A. 不填; 不填 B. 不填; a C. a; 不填 D. a; a |
答案
答案：B
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| As we all know, ______ life is hard for any of us. If we want to live ______ happy life, we must work harder. A. 不填; 不填 B. 不填; a C. a; 不填 D. a; a |
答案：B