The boy said ________ couldn't he work out the problem but his teacher didn't know how to do it.
| A．though | B．never | C．hardly | D．not only |
Supposing you _________ the lottery, what would you do with the money?
| A．would win | B．have won |
| C．had won | D．won |
Children’s brains cannot develop properly _________ they lack protein.
| A．because | B．since |
| C．when | D．unless |
We all write ____________ even when there's not much to say.
| A．now and then | B．by and by |
| C．step by step | D．more or less. |
Experts and teachers all think that failure is not __________ a bad thing to some extent.
| A．greatly | B．necessarily |
| C．definitely | D．fully |
---What do you think about the measures taken to prevent _________ global warming?
--- On __________ whole, they are good.
| A．the; a | B．the; the |
| C．不填; a | D．不填; the |