题目内容
(请给出正确答案)
[单选题]
You have been allocated a /22 network. How many usable hosts are available?()
A.510
B. 512
C. 1022
D. 1024
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A.510
B. 512
C. 1022
D. 1024
第2题
We () for you everywhere. Where have you been。
A.have looked
B.looked
C.have been looking
D.are looking
第3题
You have been working for a long time. Why not stop having a rest?()
第4题
A.have been waiting for
B.are waiting for
C.had waited for
D.waited for
第6题
After an interview, a ___________(感谢信)should be sent even if you have been rejected as a candidate.
第8题
After an interview, a thank-you letter should be sent even if you have been rejected as a candidate.()
第11题
A.had been
B.have gone
C.have been
D.am going
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