单项选择题

（）you are familiar with the author's ideas, try reading all the sections as quickly as you possibly can.

A. Now that
B. Ever since
C. So that
D. As long as

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单项选择题
Hardly（）when a loud explosion was heard.

A. the train had started
B. the train had been started
C. had the train started
D. did the train start
单项选择题
He told me how he had given me shelter and protection without which I（）of hunger and cold.

A. would be died
B. would have died
C. would die
D. will have died
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