单项选择题

The old man couldn't help______of what his wife said once again．

A．to think
B．thought
C．thinking
D．have thought
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单项选择题
19 Smoking will do harm______your health．
A．with
B．to
C．at
D．for
单项选择题
______had Jane reached the airport when the plan took off．
A．No sooner
B．Only
C．Seldom
D．Hardly
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