May I speak to your manager at four o’clock this afternoon?–I’m sorryHe ________ to a conference long before then

I’ve become good friends with several of the students ___helped me in the English speech contest last year.

依次填入下列各句横线处的成语，最恰当的一组是（ ）①他是一个心地善良的人，但性格优弱、谨小慎微，做起事来总是 ，从来不敢越雷池一步。②当今世界科技突飞猛进，我们更要勇于开拓，不断进取，如果 ，就会落后甚至被时代潮流所淘汰。③想让中国传统戏曲煥发出新的生命力，决不能满足于现状， ，唯有创新才是弘扬戏曲文化的康庄大道。

I really enjoyed your speech, ______ there were someparts I didn’t quite understand.

_______ did he tell his wife ________ hewished to do