You may do these exercises_____ in class____ after class , but you must finish them this afternoon.

问题描述:

You may do these exercises_____ in class____ after class , but you must finish them this afternoon.

either .or.
“或者.或者.”
全句的中文是说,这些练习可以课上做也可以课下做,但是今天下午必须得做完