Mr. Green is very happy because he is satisfied with his students’ work today.

The ideapuzzled me so much that I stopped for a few seconds to try to _______

When you have problems, you can _______ me_______ you.

Thanks to the work of UNICEF(联合国儿童基金会). Otherwise many children 　　　　 the chance of living a good life.

What pleasant weather! Shallwe go boating on the lake— _______.