— Show me your permit, please.
—Oh, it's not in my pocket. It
| A．might fall out | B．could fall out |
| C．should have fallen out | D．must have fallen out |
--- Have you thought of the topic for the composition?
---Not yet, I _______ it very carefully, but I haven’t decided.
| A．will consider | B．have been considering |
C．had considered | D．was considering |
--- Shall I give you a ride since you live so far away?
--- Thank you. ____.
| A．It couldn’t be better | B．Of course you can |
C．If you like | D．If you are convenient |
I would rather buy a house in the suburb than ____ in the city.
| A．it | B．one | C．this | D．that |
I _____ on a sofa because my grandparents have come for the weekend.
| A．slept | B．was sleeping | C．have slept | D．am sleeping |
____ you want to remember its usage, you’d better make a sentence with the new word.
| A．Unless | B．While | C．Now that | D．Even if |