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题目
6.During the after-school activities,some students are playing____on the playground while the rest_____doing some homework in the classrooms.
A.happy;are B.happily;is C.happily;are D.happy;is
7.About seventy percent of our earch____by water.
A.is covering B.is covered C.are covered D.are covering

提问时间:2021-12-25

答案
C play + n.或者 adv.
the rest (students)+ 复数
B earth不可数+ is
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