11. If we ________less paper, we ________the number of trees in the forests.
A. used/ will save B. use/ can save C. can use/ save D. use/ can
12. She won’t take all the suitcases ________she likes to travel light.
A. so B. but C. because D. therefore
13. She is very tired; ________, she has to finish her homework.
A. moreover B. so C. and D. however
14. - Is he an actor ________a singer? - An actor
A. and B. or C. with D. so
15. He was tired, ________he took a rest before continuing the work.
A. so B. and C. but D. if
16. Who looks ________your children when you are away from home?
A. for B. at C. after D. to
17. Why doesn’t she go ________with her university study?
A. in B. at C. to D. on
18. After coming home, she cleaned the floor ________cooked dinner.
A. but B. however C. moreober D. and
19. They didn’t understand the matter ________she didn’t ask for help.
A. but B. however C. moreover D. and
20. How about ________posters on energy saving and hanging them around our school?
A. make B. making C. to make D. to making