Chemical processes _______in the treatment of materials for clothes _______the environment badly in some countries nowadays.
A.involve;damaging | B.involved;damaged |
C.involving;damage | D.involved;damage |
—Would you like some more chicken?
—No,thanks. I am ________a diet and I’m trying to ________weight.
A.on;lose | B.on;put on |
C.in;have | D.in;lose |
He sat at the desk, __________ a novel.
A.read | B.to read | C.reading | D.Reads |
Great changes _______ in China in the past 20 years.
A.took place | B.have taken place |
C.were taken place | D.have been taken place |
The world today _____ different without the amazing discoveries produced by great scientists.
A.were | B.had been | C.would be | D.would have been |
I was surprised to find the snack shops around the school empty; the students everything!
A.had been buying | B.had bought |
C.have bought | D.have been buying |