What do you think of the new medicine-It has good results in the treatment of cancer.

They demanded that the law on gun ownership _______, otherwise more murders will arise.

Is Millie in the classroom — ,I don’t know.

Not having a good ________ of English can be a serious disadvantage to achieving your goals.

Cathy, what are you going to do this weekend?—________, I’m going to see my parents in the countryside.