水泥刨花板是什么东西:英语二题

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1.At present some people are still in___habit of drawing freely in__public places
A.the;the B.\;the C.the;\ D.a; the

2.He has failed twice, but he wants to try___third time.
A.an B.\ C.the D.a!!!

Please tell me the reason

1.c
2.d