—Nowadayscleanwaterisincreasinglyscarce.—Yes.Itissaidth...

问题详情：

—Nowadays clean water is increasingly scarce.

— is said that ________ of the water all over the world ________ polluted.

three; is           thirds; is

thirds; are       thirds; has

【回答】

B

知识点：数词

题型：选择题