Ⅰ. 单项选择：
1. We’ll have a meeting to discuss it _____ the morning of May 15th .
A. in B. on C. at D. during
**2. Peter hardly had time for concerts at that time, ______?
A. wasn’t he B. was he C. didn’t he D. did he
*3.—You will go swimming this Saturday, won’t you?
—______. I have to work this Saturday.
A. Yes, I will B. Yes, I won’t C. No, I won’t D. No, I will
