We must work hard to____ a good knowledge of English.A) inquireB) acquireC) requireD)

______ we continue to work hard, we can finish the task ahead of schedule.A．As soon asB．As

He works incredibly hard and yet needs very little sleep—he must have a strong______.A．con

We used to_____ bicycles to go to work..A. rideB. ridingC. to ride.

We used to _____bicycles lo go to work.A. rideB. ridingC. to ride

To master a foreign language requires hard work, so you______study too hard.A．shouldB．must

-----I’m more than happy to go out this weekend. ----- ______. We’ve got so much work to do at that