1、There are only twelve in the hospital.
A．woman doctors B．women doctors
C．women doctor D．woman doctor
2、Mr Smith has two ， both of whom are teachers in a school.
A．brothers-in-law B．brother-in-laws
C．brothers-in-laws D．brothers-in law
3、——How many does a cow have？
——Four.
A．stomaches B．stomach C．stomachs D．stomachies
4、Some visited our school last Wednesday.
A．German B．Germen C．Germans D．Germens
5、The of the building are covered with lots of 。
A．roofs; leaves B．rooves; leafs C．roof; leaf D．roofs; leafs
1、B 2、A
3、C stomach（胃）虽是“ch”结尾，但其发音为［k］，所以加“s”，不用加“es”。
4、C 5、A roof， chief， gulf， belief等词的复数形式，直接加“s”。