* * 清洁度的判定指标为（）
A. * * 杆菌
B.上皮细胞
C.白细胞
D.红细胞
E.杂菌
参考答案：A, B, C, E
Look at ________ pants, Amy.[ ]
A. that
B. those
C. it
—It’ s sunny today, Daddy, How about going swimming with me?
—_______. Let’s ask your mommy to go with us.
A．Don't worry
B．Never mind
C．Not at all
D．Good idea
imming with me?