Henry works in the library now, but he ____ on a farm for three years. A. worked B has worked C. had worked D. had been working
―The Guangzhou Auto show on November 23 was really wonderful. ―Absolutely! I’m sureelse can match it.
Everyone of us has many responsibilities ______us.So we must work hard.
The program was so fascinating that the children kept their eyes _____on the screen. A.to fix B to be fixed C.fixed D.fixing
We must be sure that children in our country should get well ______. A.educate B educating C.education D.educated
The professor devoted all his life ____the treatment of AIDS. A to research B.in researching C.to researching D.at researching