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【单选题】

He _____the job well, but he____so careless.

A.
had done; had been
B.
could do; was
C.
could have done; was
D.
hadn’t done; had been
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举一反三

【单选题】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