Thank you for all your hard work last week. I don’t think we ______ it without you.
| A．can manage | B．could have managed |
| C．could manage | D．can have managed |
__________ you understand the rule, you will have no further difficulty.
| A．While | B．Once | C．Though | D．Unless |
— Shall I go and buy two more bottles of beer?
— No, I’ve already bought twenty. That _____ be enough for us two.
| A．can | B．may | C．ought to | D．might |
No matter how frequently __________, the works of Beethoven still attract people all over the world.
| A．performed | B．performing |
| C．to be performed | D．being performed |
—What will you be doing at 4:00 tomorrow afternoon?
—I _____ in my office.
| A．will be typing | B．am typing | C．am about to type | D．will type |
The school _______ he once studied in is famous.
| A．where | B．in which | C．in that | D．that |