The teacher is quite satisfied ____ his students’ progress in speaking

The teacher is quite satisfied ____ his students’ progress in speaking

题目
The teacher is quite satisfied ____ his students’ progress in speaking
A .to
B .on
C .at
D .with
答案
D,因为be satisfied with sth 是一个词组.而这里his students' progress in speaking 就充当sth 的角色.
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