3. What a unforgettable experience! I’ll write it down______ it is still fresh in my memory.
A. since B. while C. after D. until
4. _________ he was the last man I wanted to see，I did all in my power to help him·
A．As B．Now that C．While D．As though
5. We need to think outside of box ______ we are to come up with something really new.
A. so that B. as long as C. once D. if高考资源网版权所有 ©2005-2009
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