单项选择题
The students（）a good rest last weekend. They were preparing for the test.
A.don't have B.didn't have C.hadn't D.won't have
单项选择题 The storm prevented me（）.
单项选择题 The soup smells（）.Would you like some?
单项选择题 The scientists are（）a series of experiments to learn more about how the body adapts to weightlessness.
