Hiking is_______ camping. I like both of them.[ ]

　Jim　isn’t　in　the　classroom.　Where　is　he？-　He　_____　to　the　teacher’s　office.

Which _______ your brother ________, apples or bananas?

I didn’t havemoney for a taxi, so I had to walk back home.

_______no doubt that a green campus plays an important role in the growth of students, both physically and mentally.