题目内容
Mother told Jim to watch the milk until it boiled and then _____ off the gas.?
| A.turn | B.turning | C.turned | D.having turned |
A
答案为A,turn off the gas与 watch the milk until it boiled并列。
【标签】谓语与非谓语动词
【标签】谓语与非谓语动词
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