We are proud of our hometown, which isin coal and natural crystal（水晶石）.

I’ll give a talk tomorrow. I’m thinkingabout_______.

It will not be long _____man can harness the solar energy and make it serve mankind

A(n) ______ idea is different from the one you have and can be used instead.

e ____ splitting headache, too.—Yeah, you’re definitely coming down with _____ flu.