单项选择题

______the building did he realize that there was danger everywhere in it.

A．Upon entering
B．When he entered
C．Only after entering
D．After he had entered
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单项选择题
I think that the labor bill will pass; it’s______that it will.
A．almost surely
B．near positive
C．quite certainly
D．very likely
单项选择题
My train arrives in Shenyang at seven o’clock tomorrow. The plane I would like to take from there ______by then.
A．would leave
B．will have left
C．has left
D．had left
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