按照要求完成下列句子。 1.I am Liu Ming.(写出同义句) _____ _____ is Liu Ming. 2.He is twelve years old .(对划线部分提问) _____ _____ is he? 3.That is an apple.(变成一般疑问句) _____ _____ an apple? 4.Are these English books?(作出否定回答) No, _____ _____. 5.It is a bus.(写出复数句) They _____ _____.