单项选择题
—I didn't see her yesterday. —Of course, you （）, because she had gone to a trip.
A. can't B. may not have C. can't have D. mustn't have
单项选择题 Friendship helps us understand （）we are, （）we need each other and （）we can do for each other.
单项选择题 —What's the matter with you —After the long walk, my leg （）and I couldn't go any further.
单项选择题 I'd like to live somewhere （）the sun shines all year long,
