问题
选择题
We _____ happy because we _____ have computers. [ ]
A. aren't; aren't
B. aren't; don't
C. don't; aren't
D. don't; don't
答案
答案：B
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We _____ happy because we _____ have computers. [ ]
A. aren't; aren't
B. aren't; don't
C. don't; aren't
D. don't; don't
答案：B