He'll never succeed,________hard he tries.
A. whatever
B. despite
C. thought
D. however
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I passed his office several times_________I could make up my mind to ring the door bell.
A. then
B. until
C. before
D. but
I got up early this morning so that I can reach the classroom at 8.
A. 对
B. 错
When there is a will, there is a way.
A. 对
B. 错
费用按其经济内容分类,可以分为若干个()。
A. 费用要素
B. 成本项目
C. 固定费用
D. 变动费用