He spoke confidently, ___ impressed me most 得分:4分
He asked me ___________ Zhang Hua came to school or not.
The scientist spoke confidently, __________ impressed me most.
You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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