charge
| A．machine | B．stomach | C．achievement | D．technology |
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 |
---Shall we go out for a meal tonight?
---__________. We haven’t been out for ages.
| A．No bother | B．That’s all right |
| C．Not really | D．I’d love to |