基础训练 4·_A_are good friends.A·Peter andl B. I and PeterC·He D. She 5 ·-Are these your grandparents?—No，B. A·they are B. they aren'tc·he is D. she isn't 6 ·Dad，_Cmy friend Tom.A ·he's B. it's C·this is D. she's
基础训练 4·_A_are good friends.A·Peter andl B. I and PeterC·He D. She 5 ·-Are these your grandparents?—No，B. A·they are B. they aren'tc·he is D. she isn't 6 ·Dad，_Cmy friend Tom.A ·he's B. it's C·this is D. she's
