—How do you study____ a test?
--I study____working_______my classmates.
| A．for , in , with | B．for, by, at | C．for, by, with | D．of, in, by |
Don’t forget ________ the lights before you go to bed.
| A．turn off | B．turning off | C．to turn off | D．turns off |
—Which sport is the most popular in China?
—I think ______ is.
| A．running | B．cycling | C．swimming | D．table tennis |
She wants to have good grades, _____ she doesn’t want to work hard.
| A．but | B．so | C．although | D．because |
Our teacher said that light______ faster than sound.
| A．travel | B．travels | C．travelled | D．is travelling |
Jack is _____ busy ______ he often forgets to have breakfast.
| A．too; to | B．enough; to | C．so; that | D．because; so |