—Where is Ms Li?—She          London.

—Where’s her second son? I haven’t seen him for a long time. —He _______ Maine looking for a place to work. 

There _______ less air pollution in the country .

--- Where is your mother?--- She _______ to Sichuan on business. She has ______ there four times recently. 

---The rain         last night. But the fields are still full of water.---It         for nearly a week.