1. Many experts seem to agree that _______ certain limit should set on ________ consumption of cars to ease air pollution.
A． a; the B．/; the C．the; / D．the; a
2. —Though it in the desert most of the year, people still live there.
—That’s the case. They say east or west home is the best.
A．hasn’t rained B． didn’t rain C．doesn’t rain D．hadn’t rained
