The traffic was very heavy and __________ we didn't arrive on time.
| A．all at once | B．in return | C．as a result | D．in addition |
The next thing he saw was smoke from behind the house.
| A．rose | B．rising | C．to rise | D．risen |
We have been told that under no circumstances ___ the telephone in the office for personal affairs.
| A．may we use | B．we may use | C．we could use | D．did we answer |
You’ll start having positive results you replace negative thoughts with positive ones .
| A．since | B．unless | C．until | D．once |
You’d better not phone me tomorrow evening; I ____ an important meeting then.
| A．will have | B．would have | C．will be having | D．will have had |
_____around the Water Cube, we were then taken to see the Bird’s Nest .
| A．Having shown | B．To be shown | C．Having been shown | D．To show |