问题
选择题
Helen and Mary are good friends. _______often help each other.
A．Them
B．Theirs
C．They
D．Their
答案
答案：C
人称代词的用法。they 代替前面所指的Helen and Mary，在句中作主语，用主格。故选C.
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Helen and Mary are good friends. _______often help each other.
A．Them
B．Theirs
C．They
D．Their
答案：C
人称代词的用法。they 代替前面所指的Helen and Mary，在句中作主语，用主格。故选C.