It’s the fourth time that heavy smog has hit the city this month. — It’s high time we _______ measures tofight air pollution.

When did Sam arrive _____ Guangzhou — the morning of November 16th .

of danger in the street at night by police,young women in India nowadays have to go home with a friend or a family member______ them

Whenever I get into trouble, I always _______ Peter.

Hurry up, you ______ on the phone. ——Oh, I’m coming. Thank you.