1.Can l use your phone? ( )
2.Could l have some more rice? ( )
3.l hope l can pass the exam with flying colours. ( )
4.l'm sorry. l'm late. ( )
5.Excuse me!May l join you? ( )
A. Be my guest.
B. Help yourself.
C.So do l.
D. Oh, that's all right.
E. Yes, please do.