问题
写作题
书面表达。
1. 
play, game, knock, at, when
2. 
tell, mustn't, take, photos
3. 
it, give, the boy, injuction, easy
4. 
by the time, get, already, go
1.______________________________________________
2.______________________________________________
3.______________________________________________
4.______________________________________________
答案
1. I was playing computer games when Lucy knocked at the door.
2. The guide tells me,"You mustn't take photos here."
3. It's not easy to give the boy an injection.
4. By the time we got there, the bus had already gone.
(答案不唯一)