411.The wet weather will continue tomorrow, when a cold front _____ to arrive.
A.is expected
B.is expecting
C.expects
D.will be expected
412.The director had her assistant _____ some hot dogs for the meeting.
A.picked up
B.picks up
C.pick up
D.picking up
411.答案是A;此句指人们现在预料冷空气要到来，故选A。
412.答案是C;考查have sb. do sth.结构。
