---Sometimesstudentsmayhave________themselves.---Let’sseewhatwecandotohe

---Sometimesstudents may have ________ themselves.
---Let’s see what wecan do to help them.A.difficulty expressingB.difficulty to expressC.difficulties in expressingD.difficulties express

A解析固定结构“have difficulty（in）doing”并且difficulty不可数，所以选A。

好好学习下

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