给下列问句选择正确的答语。 A. She made a cake. B. I want to buy a pen. C. She's my mother. D. Yes, it is. E. Yes, here you are. 1.What did she do yesterday? (_____) 2.Who's this? (_____) 3.Is it new? (_____) 4.Can I have your library card, please? (_____) 5.Can I help you? (_____)