―More than fifty students competed ________ each other in the composition competition.―But they could only compete________three medals.

People _____ are kind and honest but Tom is not such kind of person ______[ ]

I write down everything about work in my pinknotebook; ________it, I’ll forget the things I should do.

In winter, we must pay attention to _________.

What he had said about the incident and done with it _________ our trouble.