Thank you _____ your help.
A. to B. of C. for D. in
This is ______ ruler and that’s ______ eraser.
A. a; a B. a; an C. an; a D. an; an
当你早上遇见老师的时候，你应该说________。
A. Good morning. B. Excuse me.
C. Sorry. D. Thank you.
Please call Mary __________ 245—6218.
A．at B．for C．in D．of
This is my friend. ________name is Nick.
A. My B. Your C. His D. Her
—Are those your friends?
—Yes,_____________.
A．they are B．they’re
C．they are not D．they aren’t
