Are they mice?改成单数句

They are old monkeys?改成单数句 That is a yellow pineappie改成复数句They are orange改成单数句,The girl they are on sofa 改成单数句子 they are chinese boys改成单数 they are改成第三人称单数形式 they are women docters.（改成单数句） 格式是（ ）is（ ）（ ）（ ） Those are old libraries.改成单数句 Rats are quite like mice,but they are bigger.同义句Rats are ___ Whose teachers are these They are ours改成单数形式 They are old insects单数句 they are orange sweaters 改为单数句 They are American teachers(改为单数句)