1 Read and complete : happy doctor dentist school because has lt is very cold today . Some pupils are not in (1)               , Among them are Mai , Trung , Phong and Quan . Mai can't come to class because she (2)             a bad headache . Trung is at home (3)                he has a stomache ache . Phong went to the (4)                  because he has a bad toothache . Nam isn't , (5)               because he misses his friends !