1.—Would you like to come to my party tonight?
— . I have to stay at home to look after my mother. She is ill.
A. Of course not
B. That’s all right
C. I’d love to
D.I’ m afraid I can’t
2. — What did you do last summer vacation? —I got opportunity to work
a volunteer at the local hospital.
A.a; to B.a; as C.an; as D.an; for
