The of the book makes it suitable for children.The man is considering the question as .
| A．simplicity;simplifier | B．simplicity;simplism |
| C．simplifier;simplism | D．simplism;simplifier |
Some aspects of a pilot’s job ___ be boring, and pilots often ___work at inconvenient hours.
| A．can; have to |
| B．may; can |
| C．have to; may |
| D．ought to; must |
--- Must he come to sign this paper himself?
--- Yes, he.
| A．need |
| B．must |
| C．may |
| D．will |
The workers will go on strike if the demands they ____put forward are turned down.
| A．could |
| B．would |
| C．不填 |
| D．had |
I’m sure you’d rather she went to school by bus, _______?
| A．hadn’t you |
| B．wouldn’t you |
| C．aren’t you |
| D．didn’t she |
If it were not for the fact that she ____sing, I would invite her to the party.
| A．couldn’t |
| B．shouldn’t |
| C．can’t |
| D．might not |