__________ is your birthday? April 12th.[ ]
A. What
B. When
C. Which
答案：B
One evening , my dad asked me to buy some bread for dinner . It was dark and cold outside . I rode a bike to a shop near my school . When I left the shop ,it got even darker , so I got on my bike right away. Then I found a woman in a white dress riding a motorcycle after me . She followed me for a long time . I rode very fast and started to cry for help, but no one was there . I was too scared and too tired to ride any faster . At last , I gave up . The woman stopped in front of me and said , “ Why were you riding so fast , Ken ?It’s dangerous !” I looked at the woman . “ Oh , It’s you, mum !You really scared me . Dad said you wouldn’t be back for dinner tonight !”
小题1:Why did Ken go out that night ?
A．To ride a bike
B．To buy some food
C．To go to cram school
D．To look for his mother小题2:Why was Ken riding fast on his way home ?
A．He was hungry
B．Someone was following him
C．It was getting darker and colder
D．His father asked him to go home soon小题3:Who was the motorcyclist (骑摩托者) ?
A．A stranger
B．A policeman
C．Ken’s father
D．Ken’s mother
Ⅰ度深覆是指（）
A.上前牙牙冠覆盖下前牙不足冠1／3者
B.上前牙牙冠覆盖下前牙超过冠1／3而不足1／2者
C.上前牙牙冠覆盖下前牙超过冠1／2而不足2／3者
D.上前牙牙冠覆盖下前牙超过冠2／3者
E.上前牙咬到下牙龈
是指（）