This is an illness that can result in total blindness ________ left untreated.
| A．after | B．if |
| C．since | D．unless |
The doctor advised her to eat more bean products________meat which might be harmful to her heart.
| A．for lack of | B．by means of |
| C．in place of | D．in favour of |
When he was there，he________go to that coffee shop at the street corner after work every day.
| A．would | B．should |
| C．had better | D．might |
—Tom should have been warned not to cheat in the exam.
—________，but he wouldn’t listen to me.
| A．So he had | B．So has he |
| C．So was he | D．So he was |
—What do you think we should do when________earthquake happens?
—In my opinion，go to________open space away from buildings or trees.
| A．an；an | B．the；an |
| C．an；the | D．the；the |
—I’m really sorry.I thought this was a parking lot.
—________Here is your ticket.
| A．That’s all right. | B．I don’t believe you. |
| C．How dare you say so？ | D．Sorry，that is no excuse. |