二、常用词句
1. 主要词汇: happen(发生), neighbor(邻居), worried(焦虑), mystery(神秘)
2. 主要短语:used to(过去常常), might be(可能是), have fun(玩得开心)
3. 主要句型:There must be doing. (一定有…在做某事)
三、配套习题
(一)情景交际
A: I had a surprise birthday lunch yesterday.
B: Really ? Why did you say so ?
A: I thought yesterday was sad. It was raining in the early morning and rainy days always (1__________) me sad. When I got up, nobody was in, and nothing was left.
B: Oh, what (2________) then?