My sister and I _____________ playing cards.[ ]
A. am
B. are
C. is
答案：B
恒牙中发育最早的牙是（）
A.第一磨牙
B.中切牙
C.第一双尖牙
D.侧切牙
E.尖牙
Miss Lin expressed her strong determination that nothing could make her ____ her job as a teacher.
A．give away
B．give out
C．give in
D．give up
