2016-2017学年 人教版 必修5 unit1 Great scientists Language points 课件 (11)
2016-2017学年 人教版 必修5 unit1 Great scientists  Language points 课件 (11)第4页

eg: 1. The wolf opened its mouth to ______ a row of sharp teeth.

2. Don’t ______ your skin ___the sun; your skin will be hurt.

expose

expose

expose

to

露出

暴露