. The temperature can fall to –50°._____ is, 50°below freezing point.
| A．Which | B．It | C．This | D．That |
“Isn’t it about time you _____ to do morning exercises？” “Yes, it is. Would you like to join us？”
| A．begin | B．have begun |
| C．began | D．had begun |
“Do you know his address？” “No, I also wish I _____ where he _____.”
| A．knew, live | B．knew, lives |
| C．know, lives | D．know, lived |
It has been raining for a day, but even though it hadn’t rained, we _____ there by tomorrow.
| A．can’t get | B．won’t get |
| C．hadn’t got | D．wouldn’t get |
“I’ve told everyone about it.” “Oh, I’d rather you _____.”
| A．don’t | B．hadn’t |
| C．couldn’t | D．wouldn’t |
If I hadn’t been lucky enough to meet you. I really _____ what I would have done.
| A．don’t know | B．hadn’t known |
| C．wasn’t knowing | D．wouldn’t know |