题目内容
Helen has two sisters and a brother. Her brother is working, but _____ her sisters are still at school.
[ ]
A. neither
B. either
C. all
D. both
B. either
C. all
D. both
D
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相关题目
Helen has two sisters and a brother. Her brother is working, but _________her sisters are still at school.
| A.neither | B.either | C.all | D.both |