题目

如图：已知AD⊥BC , EF⊥BC , ∠1=∠2 . 求证：DG∥AB. 答案： 证明：∵AD⊥BC, EF⊥BC       ∴AD∥EF       ∠1=∠3       又∠1=∠2       ∴∠3=∠2       ∴AB∥GD______nice of you______ me two tickets for the football match.A.It's; givingB.That's; to giveC.It's; to giveD.That's; giving