My sister and I ______ a vacation this summer .

问题描述:

My sister and I ______ a vacation this summer .
A.am taking
B.are take
C.will takes
D.are taking

首先be动词用are.前面两个和在一起作为主语.排除A
情态动词will后面应该接动词原词take.排除C
be动词后面接ing形式.排除B
所以选 D.
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