—When did you go to bed last night?—I did not go to bed_____I finished my workA.if B.until C.while

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—When did you go to bed last night?—I did not go to bed_____I finished my workA.if B.until C.while
—When did you go to bed last night?—I did not go to bed_____I finished my work
A.if B.until C.while

—When did you go to bed last night?—I did not go to bed_____I finished my workA.if B.until C.while
选B ,语法涉及 not .until 直到.才