. If only you _______ there with me yesterday !
| A．are | B．were | C．had been | D．be |
The boy wanted to ride his bicycle in the street, but his mother told him _____.
| A．not to | B．couldn’t | C．not do it | D．do not to |
It’s cold in here. We must have the fire day and night.
| A．burn | B．burns | C．burnt | D．burning |
--- Who’s the man giving the speech?
--- Well, if you ____ know, his name is Lyric.
| A．may | B．can | C．shall | D．must |
-----Is it good to look up every new word when I come across it in reading?
-----No. You _______ because you are likely to guess the meaning from the context.
| A．can’t | B．mustn’t | C．don’t have to | D．shouldn’t |
—What do you think we can do for our aged parents？
—You do anything except that you visit them as often as possible.
don’t have to B. oughtn’t to C. mustn’t D. shouldn’t