I'm sorry,I left my homework at home

I'm sorry,I left my homework at home
______.
A.Not at all
B.That's right
C.All right
D.That's all right
Can you understand ______ the teacher said?
______.
A.what
B.that
C.which
D.how
You'd better _____(not play) in the open air by yourshlf.
The students were busy ______(get) ready for their exam.
He doesn't feel like _____(eat) anything.
Would you please _____(close) the window?
我根本不喜欢穿牛仔裤
I _____ like wearing jeans _____ ______