题目内容
【题目】They had much difficulty ____________ the problem and they needed our help.
A. working out B. work out
C. worked out D. to work out
【答案】A
【解析】
试题分析：句意：他们有很多困难解决这个问题，他们需要我们的帮助。have difficulty doing sth做某事有困难，所以选A。
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题目内容
【题目】They had much difficulty ____________ the problem and they needed our help.
A. working out B. work out
C. worked out D. to work out
【答案】A
【解析】
试题分析：句意：他们有很多困难解决这个问题，他们需要我们的帮助。have difficulty doing sth做某事有困难，所以选A。