单项选择题
A.where B.when C.what D.which
This terrible accident happened()the cold evening of Ju...
单项选择题This terrible accident happened()the cold evening of June 6, 1987.
A.in B.to C.at D.on
I'm still unable to make myself()in the discussion, whi...
单项选择题I'm still unable to make myself()in the discussion, which worries me a lot.
A.to be understood B.understanding C.understood D.understand
All passengers are()to show their tickets. A.ordered B....
单项选择题All passengers are()to show their tickets.
A.ordered B.required C.wanted D.forced