题目内容
The number of students in our class ____ 50. And a number of students _____ planting trees now.
A. are, are B. is, is C. are, is D. is, are
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题目内容
The number of students in our class ____ 50. And a number of students _____ planting trees now.
A. are, are B. is, is C. are, is D. is, are