问题
选择题
Mother told Jim to watch the milk until it boiled and then _________ off the gas. [ ]
A. turn
B. turning
C. turned
D. having turned
答案
答案：A
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Mother told Jim to watch the milk until it boiled and then _________ off the gas. [ ]
A. turn
B. turning
C. turned
D. having turned
答案：A