Вопрос по английскому языку:

Выберите глагол в нужной видовременной форме.
1. I (to go) to the cinema tomorrow.
a) went;
b) will go;
c) go.
2.My sister (to visit) grandparents yesterday.
a) visited;
b) is visiting;
c) will visit.
3.London (to be) the capital of Great Britain.
a) was;
b) will be;
c) is.
4.Now the children (to be) at the river.
a) is;
b) are;
c) will be.
5.Sam (to reat) a book now.
a) is reading;
b) read;
c) reads.
Пожалуйста помогите!!!