—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 |
.His composition was so confusing that I could hardly make any ________of it what’s over.
| A．meaning | B．message | C．information | D．sense |
There are certain _______when you have to interrupt people who are in the middle of doing something.
| A．chances | B．situations | C．occasions | D．opportunities |
.Being able to speak another language well is a great _____ when you're looking for a job..
| A．advantage | B．chance | C．assistant | D．importance |
It is_____work of art that everyone wants to have a look at it.
| A．so unusual | B．such unusual | C．such an unusual | D．so an unusual |
She looked up when I shouted.
| A．in a surprise | B．in the surprise | C．in surprise | D．in some surprise |