He seems ____ something valuable. He looks so worried.
| A．has lost | B．to lose | C．to be losing | D．to have lost |
Hard _____ he tried, he failed to catch up with the first runner.
| A．although | B．as | C．while | D．when |
--- Are you going to Tom’s birthday party?
--- _____. I might have to work.
| A．Thank you | B．Sounds great | C．It depends | D．Don’t mention it |
I _____ through that bitter period without your generous help.
A. didn’t go B, hadn’t gone C. wouldn’t go D. couldn’t have gone
--- What do you know about Darwin after he returned from the trip by sea?
--- Well, he got married and _____ down to live in Kent.
| A．got | B．worked | C．took | D．settled |
Tom is _____ to miss the early bus because he got up late.
| A．possible | B．probable | C．likely | D．maybe |