There ______ something wrong with my bike today, so I have to walk to school.

Not until they left school ______ how much their teachers loved them and helped them.

Whose sweater is this? —It looks like John’s. Oh, yes. It’s __________.

___ we know, in a chemical change, energy cannot be created, ____.

I hear that Lily’s brother is a worker here.—Look, the man _________ is working over there is her brother.