Most students walk or ________ / raId / bikes to school.

Miss Liu, do you have any ideas about Jiuzhaigou _______ we will play together this summer holidays?

The charity walk begins _______ 9.00 a.m. Don’t be late.—No problem.[ ]

Teaching is _________ interesting work.

I wonder if he _______ this weekend. If he ______, I’ll let you know.