bai 3 choose the correcswer 1.they are my...............(frend/pens/ruler/rubber) 2..................is my bookcase(they/those/these/it) 3.those..................my penclis(is.am.are.do) 4.what colour ..................................your book ,nam(is,am,are,do) 5 what colour................your pens?( is am are do) 6 is ...........................your desk?(those,these,that,they) 7 what colour.......................they?(is, am ,are,do)