I can’t find the pen I was given. Have you seen _____?[ ]
A. it
B. one
C. this
D. that
答案:A
--- _______ ham do you have?
--- _______. I’m afraid we have ______ beef in the fridge.
A.How much; None; no
B.How much; No; not
C.How many; None; none
D.How many; No one; none
在其他情况不变的情况下,对于一般商品来说,随着收入的增加,需求会有所()。
A.上升
B.不变
C.不确定
D.下降
E.先上升后不变