They have some_____ getting there.A.question B.problem C.questions D.problems应该选哪个好.

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They have some_____ getting there.A.question B.problem C.questions D.problems应该选哪个好.
They have some_____ getting there.A.question B.problem C.questions D.problems
应该选哪个好.

They have some_____ getting there.A.question B.problem C.questions D.problems应该选哪个好.
They have some__ D.problems___ getting there.

d

正确:D
question比较简单。通常与ask/answer连用。
problem比较困难,通常与work out/solve连用。

D
questions就当成是 问题
problems就当成是困难。