单项选择题

Waving one's arms can be accepted as ______ for help.

[A] to cry
[B] crying
[C] cried
[D] cry

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单项选择题

Jane owes ______ to her father that she has been able to finish her college education.

[A] that
[B] much
[C] it
[D] /

单项选择题

I was thirsty, for I ______ nothing all day.

[A] drank
[B] had drunk
[C] had been drinking
[D] have drunk

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