—Students should do sports _______one hour a day.
—I agree. It’s good for their health.
| A．of course | B．as long as |
| C．at least | D．in fact |
—Lily, _____ you _____ your ticket?
—Not yet!
| A．did; find | B．do; find | C．has; found | D．have; found |
We couldn’t wait _______ a good rest after the exam.
| A．have | B．to have | C．making | D．to make |
Although we’ve learned English for years, we have trouble _____ the foreigners.
| A．understand | B．to understand | C．understanding | D．of understanding |
-----How many students are there in the classroom?------_______.
| A．Nobody | B．None | C．No one | D．No |
Students are supposed ________ hard at school.
| A．studying | B．studied | C．to study | D．study |