難度：★ 考點：連詞
1. We should care more about our health _______ good health is the first step towards success.
A. so B. because C. but D. if
2. -Why didn't you try your best to get on the subway?
-I tried to, but it started moving_________I could get on it.
A. before B. after C. since D. if
3. Tcny is only four years old, _______he draws very well.
A- but B, so C. or D. and
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