Use the predicate in the correct form according to the rules of agreement 1) it’s they who ) responsible for the delay. 2) there (is\are) a laptop and two mobile phones on the desk. 3) it is you who (is\are) right. it is i (is\are\am) wrong. 4) the government (have\has) been discussing issue since spring.
1 are
2 is
3 it is you who are right.It is I who is wrong.
4 has
1)are
2) is
В этом 100% верно так