This is a very interesting book.I’ll buy it,_____. [ ]

At present , the terrible foggy haze（雾霾）weather has influenced our normal life badly . So our government should _____ to reduce the air pollution.

. — Mary, turn off the lights and lock the door before you leave.—________.

What is this _____ English?—It’s a map. [ ]

____ you ____the work?–No, we need two more hours.