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Internet上使用的最重要的两个协议是TCP和SMTP。()

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学生的科学行为、习惯是获得科学知识的必要条件。()

The room as a laboratory for nearly two years till now.

A. is used
B. was used
C. has been used
D. had been used

楚辞是战国后期楚国大夫屈原开创的一种新诗体。()

James had never seen Brando again, was really a pity.

A. who
B. what
C. which
D. where