I spent my spare time _____ computer games.
A. to play
B. playing
C. played
D. play
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It is a waste of time _____ boring things.
A. to do
B. doing
C. did
D. done
I like doing math exercise; it _____ my mind busy.
A. to keep
B. keeping
C. kept
D. keep
What will you do _____ your spare time?
A. to
B. of
C. on
D. in
Dear Mike,I am glad that you will come to Changsha on October 1. Since Changsha is a 11._____(著名的) garden city, I will 12._____(介绍) this beautiful city to you. 13._____(在上午), we will 14._____(参观) Yuelu Mountain. You can see many 15._____(历史古迹), especially Yuelu Academy.