题目内容
根据句意在下列各句空缺处写出各单词的正确形式
How long did you spend in ________ (计算) it out?
I'm not sure of that ________ (也).
You'd better ________ (躺) down and have a good rest.
What's the ________ (丢失) book?
In his ________ (第3) year, he left Harvard to work for a company.
