Put the verb to be into the correct from of the

Put the verb to be into the correct from of the Present Simple 1.My friends wife (to be) a doctor 2.Moscow (to be) the capital of our country. 3.Orlovs children (to be) at the lesson now. 4.They (not to be) at scholl now,they (to be) at home. 5.These boys (to be) your children? 6.I (to be) happy to have such a friend. 7.We (to be) four in the family. 8.Where (to be) you now? 9.My grandmother (to be) charming. 10.What (to be) your father? 11.Mike (not to be) right. 12.I (to be) a student.