Clearing forests for timber has resulted ....... the loss of biodiversity.

She saw a butterfly .......... the window.

As I was ....... of the change in the program, I arrived half an hour late for the rehearsal.

Let's drink .......... his success.

Washington State is famous ______ its apples.

There's nothing .......... exercises for making you warm.

He has been absent ____ school very often lately.

Jane doesn't spend much money______ clothes.

I write letters _______ my right hand.

Bien Hoa is secured .......... floods.

Family members who live apart try to get together ...... Tet.

According ..... Bill, there's something wrong  ........ my computer.

Those books deal mainly_______ tropical plants.

We areall aware____________ the importance of the environment protection.

Mr. Johnson said he was ......... favor of doing the work right away.

Our flat is ......... the second floor of the building.

If you want to lose weight, you must go ___________ a diet.

You should make use___________ the books you have.

Endangered species are plant and animal species which are ________ danger of extinction.

Our flat is ....... the second floor of the building.

His opinion is different _____________ mine.