Many a student ________ failed in the biology exam,and Tom is the only one of them who ________ decided to give up the course.
---- It’s the office! So you _____ know eating is not allowed here. ---- Oh, sorry.
You should write a _____________ composition every other week.
Although _______ my opinion, the old professor didn’t come up with his own.
Anyone , once _______ positive for H7N9 flu virus , will receive medical treatment from our government.
The computer was used in teaching . As a result, not only __________ , but students became more interested in the lessons.