We have decided to try ________ best to raise more money for the local charity.

David lives on the ________ floor. It is too high, so he has to take a lift every day.

I think the man over there must be Bob.— It _______ be him. He has gone to England.

Don’t ______ /l?k/out of the window in class.

Toby help the teacher hand__________the exercise booksto everyone in the class.[ ]