—We should _______ humans from ________ down too many trees. —I agree with you. Trees are very important to us.              
#54198
A
keep; cut
B
prevent; cut
C
stop; cut
D
prevent; cutting
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--I’m sorry I _____ my exercise book at home.--Don’t forget _____ it to school tomorrow, please.
#53803
A
forgot, to take
B
left, to bring
C
forgot, to bring
D
left, to take
 — How does Jack usually go to school? — He _____ ride a bike, but now he ______ there to lose weight.
#55104
A
used to; is used to walk
B
was used to; is used to walking
C
was used to; is used to walk
D
used to; is used to walking