听力原文:W: What's Sally doing over there all by herself? M: She's the only one in the group who hasn't come out of her shell yet. Just leave her alone— she needs time to gain confidencE. Q: What do we learn about Sally? (18) A.She hasn't finished with the shell yet. B.She lives alone by herselF. C.She fails behind others. D.She's lacking in confidencE.