---Sometimesstudents may have themselves. ---Let’s see what wecan do to help the
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---Sometimesstudents may have ________ themselves.
---Let’s see what wecan do to help them.
A.difficultyexpressing
B.difficultyto express
C.difficultiesin expressing
D.difficultiesexpress
试题答案
A
固定结构“have difficulty（in）doing”并且difficulty不可数，所以选A。