If the boy had _____ the dog alone it wouldn't have bitten him.
| A．set | B．left | C．had | D．put |
Then you usually lie there just ______ the ceiling, thinking about everything that could go wrong.
| A．glancing at | B．watching at |
| C．glaring at | D．staring at |
---Do you mind my taking the books away?
---________.
| A．Certainly, please do | B．No, go ahead |
| C．Yes, not at all | D．No, please don’t |
—Who______ it be that is knocking at the door?
—It ______ be Father, but I’m not sure.
| A．can; must | B．can; may |
| C．must; can | D．may; must |
The reason for his success is ______ he worked very hard.
| A．that | B．why | C．whether | D．How |
－How do you like our restaurant?－I can’t find a ________one.
| A．good | B．better | C．best | D．Fine |