There is a limited amount of work that you can do, ____________ hard you work.
A. wherever
B. whatever
C. however
D. whenever
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If Mary _____________ here now, she wouldn't agree you to do so.
A. were
B. is
C. had been
D. has been
I have been searching in the library for 3 hours, but I ____________found the book I want yet.
A. hasn't
B. did't
C. haven't
D. don't
компьютер的意思
A. 手机
B. 笔记本
C. 电脑
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