温馨提示：
此套题为Word版，请按住Ctrl,滑动鼠标滚轴，调节合适的观看比例，答案解析附后。关闭Word文档返回原板块。
课时提升作业(二十一)
Ⅰ. 单项填空
1. (2013·郑州模拟) Mr. Wang, _______in his new novel in the past two years，hasn’t realized the decline in his health.
A. involved B. being absorbed
C. having involved D. to be absorbed
2. My father walked _______ in the room as if he was thinking about something very important.
A. little by little B. up and down C. more or less D. sooner or later
3. What’s your opinion of Mr. Li’s request that we ____ spend half an hour reading English aloud every morning?
A. must B. would C. should D. could
4. (2013·天津模拟)Laws will have to be made to ensure that cloning researches develop further ______ mankind.
A. in favour of B. in memory of
C. in praise of D. in search of
