问题
68 Mind you Don’t bump your head on thelow________when you go upstairs for sleep
A:should have a false tooth fixed in its place
B:have to put it under your pillow at once
C:will gain a permanent tooth in future
D:/; /
B:have to put it under your pillow at once
C:will gain a permanent tooth in future
D:/; /
正确答案是：
