Though we have spent two nights in _______ the problem, we still can't find a so
A.working in
B.working out
C.working up
D.working on
A.working in
B.working out
C.working up
D.working on
第1题
A.worth
B.reasonable
C.beneficial
D.worthwhile
第2题
By the time Bob arrives in Beijing, we have already arrived here for two days.
A.we have been staying here for two days
B.it has been for two days we have stayed here
C.it is already two days before we have arrived here
D.we will have stayed here for two days
第3题
By the time Bob arrives in Beijing, we have already arrived here for two days.
A.we have been staying here for two days
B.it has been for two days we have stayed here
C.it is already two days before we have arrived here
D.we will have stayed here for two days
第4题
We have spent ______ sum of money ______ we did last year on advertising.
A.the same; as
B.the same; that
C.such; as
D.as; as
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