11.Don’t play ______ basketball here.It’s dangerous.

11.Don’t play ______ basketball here.It’s dangerous.
A.a B.an C./ D.the
12.This is ______ apple.It’s _______ big apple.
A.an,a B.a,the C.a,an D.an,the
13.--- Have you seen ______ bag?I left it here just now.
--- Is it ______ one on the chair near the door?
A.a,a B.the,the C.a,the D.the,a
14.I have ______ blue coat.
A.a B.an C.the D.some
15.This is _____ orange._______ orange is on the table.
A.a,The B.an,The C.an,An D.the,An
16.Have you had ______ breakfast?
A.a B.an C.the D./
17.He wondered when the doctor could finish _____ operation.
A.a B.an C.the D.any
18.After ______ supper,he stayed at home and played ______ violin.
A.the,the B./,the C./,a D./,/
19.There is ______ apple on the plate.
A.a B.an C.the D./
20.He said that he got ______ “ C” in the test.
A.a B.an C.the D./