難度：★    考點：連詞

　　1. Frank lives a simple life______ he  has lots of money.

　　A. although  B. because   C so   D. if

　　2. I didn't believe he could drive            he told me.

　　A. once            B. while            C. since            D. until

　　3. The man was so tired,    he still went on working.

　　A. so      B. but             C.  or             D. and

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