5
单句改错
Physics are a very interesting subject. His family was all music lovers. The pair of shoes are worn out. Half of the students has finished their composition. The number of students in you are 50. The cattle is eating grass on the hill. A knife and fork are used to have meals.
is
are
is
is
is
were
have
Rule2.
意(义)单谓单;意(义)复谓复
意义一致原则