The factory ______ its waste into the river, but now it deals with the waste in a new way.
A. used to dump B. is used to dump
C. used to dumping D. is used to dumping
For everyone’s safety, we ___________ a1ways remember the law against driving after drinking.
A. could B. should C. might D. would
Everyone, including her parents, _______ the Wolf Hill, and they will be back this afternoon.
A. has gone to B. have gone to C. has been to D. have been to
Wearing white can help people _______when they feel stressed.
A. fall down B. calm down C. look down D. come down
David didn’t give up ______ he had failed in the experiment four times．
A. if B. while C. though D.since
—Look! That teacher is explaining something to her students again and again!
—_______teacher she is!
A. How patient B. What patient C. How a patient D. What a patient
