Mother told Jim to watch the milk until it boiled and then off the gas.A. turnB. turnin

发布时间：2020-08-17 14:44:56

Mother told Jim to watch the milk until it boiled and then      off the gas.
A. turn
B. turning
C. turned
D. having turned

网友回答

A. turn
B. turning
C. turned
D. having turned
解析：
turn off the gas与 watch the milk until it boiled并列。
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