问题
选择题
If we _____ nothing, there _____ fewer and fewer tigers in the world. [ ]
A. will do; will be
B. do; will be
C. don't do; will be
D. do; will have
答案
答案：B
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If we _____ nothing, there _____ fewer and fewer tigers in the world. [ ]
A. will do; will be
B. do; will be
C. don't do; will be
D. do; will have
答案：B