The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.
| A．what | B．which | C．that | D．though |
—Do you think he will come to my birthday party?
— ________.
—That’s good. Everybody’s expecting him.
| A．You can count on it | B．I don’t know for sure |
| C．You can believe him | D．It depends |
— ________
—Er…I want to buy my wife a gift for Christmas, but I don’t know what she would like.
| A．What are you looking for, sir? | B．Welcome to our store, sir. |
| C．May I help you, sir? | D．What on earth do you want, sir? |
—Have a nice weekend!
— ________.
| A．Sure, I will | B．I’m afraid I won’t |
| C．All right | D．Thanks. You too! |
— ________ ?
—I said, “Do you need any help?”
—That’s very nice of you. I guess I could use some help.
| A．What seems to be the problem | B．I beg your pardon |
| C．Repeat | D．And what |
—Would you mind if I use your telephone?
— ________. Help yourself.
| A．Not at all | B．Certainly |
| C．No, I wouldn’t | D．OK |