206. It’ s a long time______we met each other last year.
A.so B.after C.since D.before
207. I’ll ask her to give you a reply______she comes back.
A.since B.before C.until D.as soon as
208. ______the headmaster came into the classroom, all the students stop talking to each other.
A.While B.If C.Since D.When
209. ________ the man grew older, he lost interest in everything except gardening.
A. With B. Since C. While D. As
210. ________ you understand this rule, you’ll have no further difficulty.
A. Once B. Unless C. As D. Until
206-210 CDDDA
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