---Sally is ill. Do you know what’s the matter with her? ---Poor girl. Her illness is the_________ of eating unhealthy food.
---Could you tell me _____? ---About two months.
It’s too noisy here. Please ask him to ____the radio a little.
I ____my CD here and there, but I still can’t find it.
You must read the ___carefully before taking the medicine.
Miss Zhao is very helpful. She often helps us ____we are in trouble.