We _________ the lessons _________ of last month.
A. finished, in the end
B. had finished, to the end
C. had finished, by the end
D. will finish, at the end
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You should try to write __________ eve n when you ’ re busy. As you know, practice makes perfect.
A. now and then
B. more or less
C. sooner or later
D. here and there
目前常用的网络传输介质有:双绞线、同轴电缆、光纤和无线信道()