— Susan, would you like to go hiking with us this afternoon?— I'd love to, but I study for a test.A. may B. have to C. can
_____ exciting job it is to work as a guider in such a big mall.
It’s very nice of you to _____ so much time showing me around your school.
I don’t like traveling by air _____ you usually have to wait for hours before the plane takes off.
Of all the five dictionaries, which do you think is _____ ?
--Can you help me to _____ my dog when I leave for Hong Kong? -- Sure.