Ihaddifficulty

問題詳情：

I had difficulty _______ the maths problem.

A. working out         B. work out                   C. to work out            D. works out

【回答】

A  have difficulty (in) doing sth.意爲“做某事有困難”，爲固定搭配。work out計算出。

知識點：動詞和動詞短語

題型：選擇題