We must make use ____our spare time.
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Learn to rely ____yourself first, then others.
A. in
B. on
C. at
D. for
If you are curious ___another language, then just start learning it.
A. about
B. of
C. for
D. to
Mikeis responsible ___ designing the entire project.
A. to
B. for
C. about
D. at
It’s difficult for me to ___ the question.
A. answer
B. answers
C. answered
D. answering