I’m very ________ about expressing my opinions in public in case I may make mistakes.
| A．cautious | B．confused | C．delighted | D．enthusiastic |
We are going to have a barbecue _______ it rains .
| A．if not | B．when | C．except that | D．unless |
He wouldn’t give up smoking _______ his doctor told him it was a matter of life and death.
| A．except | B．after | C．until | D．in case |
I sent the letter early that morning _______ she got it that afternoon.
| A．in order that | B．so that | C．for purpose that | D．in order for |
______ did it , I didn’t.
| A．Who | B．Whoever | C．No matter whom | D．No matter when |
_______I know , the computer can never take the place of the human brain.
| A．As for | B．As long as | C．So far for | D．So /As far as |