Do you know from Yiyang to Changsha?A. how far it is B. how far is it C. how long is it
You _______ walk across the road. It’s dangerous.
You’d better _______ too much meat. You are much too fat.
You should _______ the doctor’s advice and _______ the medicine on time.
_______ necessary for us _______ our environment clean and tidy.
She was afraid of __________SARS because it was dangerous.