The teacher gave the books to all the students except who had already taken them.
| A．ones | B．some | C．the ones | D．the others |
He is really nervous. He ________ back and forth all the night waiting for the results.
| A．walked | B．had walked |
| C．has been walking | D．walks |
It was because we went on separate ways ________ I felt relieved.
| A．that | B．when | C．how | D．which |
The teacher taught us to find a planet in the solar system in his last lesson, ________ everything through jokes.
| A．having explained | B．explained |
| C．to explain | D．explaining |
Basically, we don’t need heaters in Chongqing, but it ________ be very cold in winter.
| A．must | B．will | C．shall | D．can |
The most successful students are usually ________ who come to all the classes.
| A．that | B．those | C．them | D．one |