_____ your help, we _____ complete the work in time.
| A．Thanks to; were able to | B．Thanks to; could |
| C．As; would | D．Because; had to |
The flowers his friend gave him will die unless______ every day.
| A．watered | B．watering | C．water | D．to water |
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 |