问题
选择题
— _____ to turn off all lights before you leave the office.
—I won't forget, Ms Si. [ ]
A. Until
B. Be sure
C. Because
D. Though
答案
答案：B
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— _____ to turn off all lights before you leave the office.
—I won't forget, Ms Si. [ ]
A. Until
B. Be sure
C. Because
D. Though
答案：B