I __________get on the bus when I heard someone calling me from behind.

Did you watch the basketball match yesterday? —Yes. You know, Jeremy Shu-How Lin, who is one of my heroes, ________ in the match.

When ______ comes to research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.

Bob can play ________ tennis but can’t play ________ violin.

I do homework every day, usually when I come homeschool. [ ]