—Who _____ it be that is knocking at the door?
—It ______be father, but I’m not sure.
| A．can; may | B．may; can | C．may; must | D．need; should |
—Now that I’ve finished my exams, I’m going to relax and go for a vocation tomorrow.
— _____! I’ve still got two finals to take.
| A．How nice | B．Lucky you |
| C．So far,so good | D．Good luck to you |
______ at the door before you enter my room, please.
| A．Knock | B．Knocking | C．Knocked | D．To knock |
Marry _____ as a secretary in this company for twenty years and now she stays at home taking care of her own garden.
| A．has served | B．had served |
| C．has been served | D．served |
_______ with care, one paper-bag will last for six weeks.
| A．Use | B．Using | C．Used | D．To use |
---Do you mind my opening the window?
----______I feel a bit cold.
| A．Of course not. | B．I would rather you didn’t. |
| C．Go ahead . | D．Why not? |