题目内容

There is no doubt that all this puts a large _________ on a teacher with a large number of classes.
A.taxB.catastropheC.senseD.burden
D
tax 税,税款,税金; catastrophe大灾难,大祸; sense感觉,意义,理性;?burden?担子,负担。a large burden 一个很大的负担。
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