How long __________ your parents ___________? —For about twenty years.

The little elephant is afraid to go alone. He always walks _______ his mother. [ ]

He lives_____ with his grandparents. [ ]

With the support of the Chinese government, many patients in poor areas can _togo to hospital.

Could you tell me when your father___back?—I’m not sure now. but when he ___next week, I’ll tell you.