—Do you think that the bridge over the river can befinished before the rain season comes? —Certainly, it completedon time, the number of the workers has been increased by 20%.
A.
. to get
B.
. getting
C.
. having got
D.
. get
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【单选题】下列总蒽醌的乙醚液中,若用 0.5% 的 Na 2 CO 3 溶液萃取都能被提取出来,除了 ( )