問題詳情
7. The factory manager reports that currently all the machinery _________at full capacity.
(A) will have been operated
(B) was operating
(C) had operated
(D) isoperating
參考答案
答案:D
難度:困難0.362963
統計:A(34),B(14),C(20),D(49),E(0)
用户評論
【王菘俞】評論
所以 all the machinery要用單數動詞is囉 ?