Amy is very afraid of dogs,_______?
反义疑问句,前面为肯定,所以反义部分为否定,即isn't,该句意思为:Amy非常怕狗,不是吗?
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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