Excuse me, what’s this for?—It’s a cleaner and ittopick up dirt. A．uses

I don’tknow if Mr. Li ____ to the party this evening.–I think he will come if he ____ free.

Most countries of the world have records of the great natural catastrophes that before.

The students are ________ young people between the age of sixteen and twenty[ ]

The money collected should be made good use ________ the people who suffered a lot in the earthquake.[ ]