We are grateful (at/in/on/to) our teacher.

We could not play soccer due __________ the bad weather.

It was very kind .......... you to lend me the money I needed.

He’s getting bored_____________ learning_____________ heart.

I waited _____ 10 o'clock and then went home.

A beautiful clock was given _________ her by a handsome boy.

Our study is very important____________ our future and useful_____________ our country.

Opening the parcel, hewas surprised ____________ what he saw.

.............. of the concert, there was great applause.

We just rested _________ a short time.

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

The price of electricity is going up _____ August.

He always prevents me_______ doing my duty.

Can you send it to me_______________ fax?

William is .......... meanness.

Yesterday, I was talking ______my doctor ______a mysterious epidemics near here.

They have been waiting ......... the bus for half an hour.

Did Mr. Kennedy park his car .......... front .......... our house?

He succeeded ________ getting a scholarship.

Plant and animal extinction leads _________ loss of biodiversity.

What did that man die ________? –A heart attack.