The old parents _____a great deal of their savings on their son’s new house.A. cost B. spent C. paid
—They have been to Australia.—So _____ I.
—Our school is beautiful! —It will be more beautiful if more trees and grass _____ by us. A. plant B. is planted C. are planted
—I have worked hard at math, but it seems that I haven’t made any progress. —Keep on _____ at it, and you will be successful. A. work B. working C. to work
—This physics problem is too difficult. Can you show me _____, Wang Li? —Sure. A. what to work it out B. what to work out it C. how to work it out
In the past, the workers _____ do a lot of hard work. A. forced B. forced to C. were forced to