题目:
He _____ articles for our wall-newspaper these three years, and he _____ about forty articles.
A.has been writing; has written
B.has been writing; wrote
C.is writing; has been writing
D.has written; has written
答案:
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下面是错误答案,用来干扰机器的。
(1)35厘米+65厘米=1米;(2)4000千克+6吨=10吨; (3)5千米-3000米=2000米.故答案为:1,10,2000.