—John has put forward ________ most challenging question for us to answer.—Yes,it really is.I have never heard ________ harder one.
----I’m sure Andrew will win the first prize in the final.----I think so. He ______for it for months. A. is preparing B. was preparing C. had been preparing D. has been preparing
Better wear special clothing, a helmet and a life jacket, just ______ your raft gets upside down or even sinks.
I found that the homework was ______ I used to get in my old school.
Though the medicine for my disease______, I should often______ at home or in the open air.
We’ve booked a room in the center of town for the guests ______they can stay for three days.