Some researchers believe that there is no doubt ______ a cure for AIDS will be found.
| A．which | B．that | C．what | D．whether |
—We should believe in ourselves.
—________ Selfconfidence is the first secret of success.
| A．I'm with you on that. | B．Thank goodness! |
| C．Let's get going. | D．It's up to you. |
—Is this Mr. White's office, Mary?
—Yes，________.
| A．all right | B．it doesn't matter |
| C．after you | D．help yourself |
—Hi, Tom. Do you still smoke?
—________. It's three years since I smoked.
| A．No, I don't |
| B．Yes, I do |
| C．Not too much |
| D．Oh, yes, but I wish I didn't |
—I'd like some bread and some fish. What about you, Tom?
—________
| A．Not really. | B．Me, too. |
| C．Good idea. | D．It depends. |
—I'm afraid it's going to rain this afternoon.
—________ Look at the dark and cloudy sky.
| A．Not really. | B．Is it? |
| C．Why not? | D．I guess so. |