The new manager had a bad cold, and _________ couldn’t come to the party.
| A．besides | B．because | C．however | D．therefore |
It may rain --- you’d better take an umbrella _________.
| A．in case | B．in this case | C．in no case | D．under the case |
A notice was placed by the river bank warning people to ___________ the thin ice.
| A．keep off | B．keep out | C．keep away | D．keep on |
I was close to being killed the other day. A car passed me at ____ I thought was a dangerous speed.
| A．as | B．which | C．what | D．that |
After half a year’s training, they were made entirely used ____ underwater.
| A．stay | B．to stay | C．to staying | D．staying |
Thank you very much for the trouble you have taken _________ me with my English.
| A．helping | B．to help | C．help | D．helped |