[題目] 過去簡單式與完成式如何選

作者: wayneHsu (Wayne)   2016-05-28 14:46:42
書名:Toeic official guide
版本:IV
頁數:p.57 151
題目:
Dixon has a smaller production plant in Cardiff,Wales,where a similar
project commenced early last year. the work at Cardiff ____ within seven mont
hs.
(A) has been completed
(C). was completed
疑問:為甚麼是C而不是A

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