Boys, don't stop-please _______ with your work.
A. carry on B. get on C. turn on D. work on
－ Can you help me clean the room?
－ OK, _______ I have to wash the clothes first.
A. so B. but C. because D. as
Everybody knows that blind people shouldn't _______.
A. look down on B. be looked down C. look down D. be looked down on
I think _______ is meaningful to help other people.
A. it B. this C. that D. /
Great changes _______ in our country since 1990.
A. were taken place B. took place
C. have taken place D. have been taken place
－ Have you seen the film Kongfu Panda?
－ No. but some of my friends _______.
A. are B. have C. do D. will
