—How did you find the talk this morning?
— ________.
| A．By asking my students | B．It was easy to find |
| C．Very disappointing | D．Just in time for it |
—You should have given me a ring before you left.
—I meant______, but I was in a hurry that time.
| A．to do | B．to | C．do | D．doing it |
Some researchers believe that there is no doubt ______a cure for AIDS will be found.
| A．which | B．whether | C．that | D．what |
He was about to tell me the secret ______ someone patted him on the shoulder.
| A．as | B．while | C．when | D．until |
______ you’re tried it, you can’t imagine how pleasant it is.
| A．When | B．Although | C．Because | D．Unless |
For miles around me there was nothing but a desert, without a single plant or tree ______.
| A．on earth | B．in sight | C．at a distance | D．in place |