.No matter how fast we worked,____.
| A．we couldn’t catch up with them | B．and we couldn’t catch up with them |
| C．so we couldn’t catch up with them | D．but we couldn’t catch up with them |
My parents in Hong Kong. They were born there and have never lived anywhere else.
| A．live | B．lived | C．were living | D．will live |
I like getting up very early in summer. The morning air is so good .
| A．to be breathed | B．to breathe | C．breathing | D．being breathed |
The CDs are on sale! Buy one and you get completely free.
| A．other | B．others | C．one | D．ones |
When he the door, he found his keys were nowhere.
| A．would open | B．opened | C．had opened | D．was to open |
–I am so sorry to have come late for the meeting.
-It’s not your fault. With rush-hour traffic and heavy rain, it is no wonder you were late.
| A．a; a | B．the; the | C．/; / | D．/; a |