Is that boy under the tree Li Ming—No, it _______ be Li Ming. He is in Shanghai now.

Are you as friendly as your sister—No, I’m not. I’m _______ than her.

The teacher agreed to the suggestion that the students ________ two weeks to prepare for the exam.

Riding a bicycle can be fun. But _______ you ride a bike to work, and then there isn’t one to ride home?

_____ in the library regulations that any book borrowed be returned by due time, or the borrower will be fined．