Выберите правильную формулу глагола "to be" :1) She ... in the

Изберите правильную формулу глагола "to be" :
1) She ... in the 9th grade.
a) are
b) am
c) were
d) is

2) When and where ... you born?
a) are
b) is
c) was
d) were

3) They ... at the cinema now.
a) were
b) is
c) was
d) are

4) When I was a child, I ... fond of skiing.
a) am
b) is
c) was
d) were