填空题

(theory) () methods are sometimes useless outside of the laboratory.

【参考答案】

Theoretical

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填空题

Even though (give) () every opportunity, they would not try.

单项选择题

Why can’t Jack see Dr Johnson tomorrow()

A．Because Dr. Johnson is busy tomorrow.
B．Because Dr. Johnson won’ t come to his surgery tomorrow.
C．Because Jack is on duty tomorrow.
D．Because Jack is busy tomorrow.