单项选择题

—You were brave enough to raise objections at the meeting. —Well, now I regret ______that.

A．to do
B．to be doing
C．to have done
D．having done
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单项选择题
He said he______ me a present unless I ______in doing the experiment.
A．had not given; had not succeeded
B．would not give; succeed
C．will not give; succeed
D．would not give; will succeed
单项选择题
The experiment was ______ easier than we had expected.
A．more
B．much more
C．much
D．more much
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