单项选择题
That ______ the case, we have to make some changes in our plan.
- A．is
B．was
C．being
D．has been
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This detective story might not be ______ interesting to keep the child awake.
A．enough
B．adequately
C．amply
D．sufficiently -
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The accident ______ downtown yesterday resulted from the driver's carelessness.
A．happening
B．happened
C．which had happened
D．which happened -
单项选择题
I regret ______ you that I can't go to Hangzhou for a visit next Sunday with you, because I've caught a bad cold.
A．to tell
B．telling
C．tell
D．having told
