语法题请教

wxiaobin · 发表于 2003-10-6 11:43:00

2.    Drinking water ________ excessive amounts of fluorides may leavea stained or mottled effect onthe enamel of teeth.
(A)    containing
(B)    in which containing
(C)    contains
(D)    that contain

答案D，我觉得不对，为什么没有单数形式？

michael_wind · 发表于 2003-10-6 12:26:00

答案D 错，应该是A, D应该改为that contains

语法题请教

语法题请教

所属分类: TOEFL / IELTS

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