13. There are many trees on ______ sides of the road.
A. every
B. each
C. both
D. all
12. We couldn’t help ______ when we heard the funny story.
A. laugh
B. to laugh
C. laughed
D. laughing
11. How much did you _______ on this new car?
A. cost
B. pay
C. spend
D. take
10. We decide not to climb the mountains because it was raining ______ .
A. badly
B. hardly
C. strongly
D. heavily