题目内容
The survey shows that ______ we are enjoying less and less good sleep, rates of heart diseases have risen rapidly．
| A．while | B．although | C．if only | D．as though |
A
解析
I haven’t had a phone in the house for three weeks now, and it’s several days ____I used a phone box last time.
| A．as | B．when | C．if | D．since |
Milk will turn sour soon on hot days ______ it is stored in the refrigerator．
| A．since | B．until |
| C．because | D．unless |
Be sure to take a trip to the Wadesell． it's a long drive on a dirt road，it's well worth the trouble．
| A．Only if | B．Now that | C．Even though | D．In case |
That was really a splendid evening. It's years________I enjoyed myself so much.
| A．when | B．that | C．before | D．since |
You cannot take back your words _________ they are out of your mouth.
| A．before | B．whether | C．once | D．while |
- We've only got this small bookcase. Will that do?
- No, _ _ I am looking for is something much bigger and stronger.
| A．who | B．that | C．what | D．which |
I have a tight budget for the trip, so I'm not going to fly _ the airlines lower ticket prices.
| A．once | B．if | C．after | D．unless |
Sinking in the cheers of people, David walked off the stage, tears dropping he could stop them．
| A．after | B．when | C．until | D．before |