MrBrown is _____ a teacher to us; we look on him as our friend[ ]

Sally is ill. Do you know what’s the matter with her —Poor girl. Her illness is the_________ of eating unhealthy food.

Many city people their bikes to work every day.

We have _________ our position on the issue (期刊)! Whatever happens, we won’t change it.

It’s a CD _______ English.