Заполните пропускт, употребив глагол to be в правильной формет

a) John_a student.

b) It_cold today

c) Cars_expensive

d) I_happy

e) Mary and Jane_from Canada

Is

is

are

am

are

That's very easy: John = singular noun, third person (is), "It" is a singular pronoun, third person ("is"), "Cars" is a plural noun (are), I is a first person singular pronoun (am), Mary + Jane is a coordination (plural), so we use "are".