... Chuyên đ Luyn thi Tt nghip THPT và Luyn thi i hc, Cao đng 20 09 John went to the mountains on his vacation, and we did too. John went to the mountains on his vacation, and so did we. ... friend lived in Hai Phong, so did his sister 4. These books don’t belong to me, those don’t either / neither do those. 5. I don’t believe it, my friend doesn’t either. 6. I don’t like the hot ... friend lived in Hai Phong, (his sister) 4. These books don’t belong to me, (those) 5. I don’t believe it, (my friend) 6. I don’t like the hot weather, (my wife) 7. Trees don’t grow very well...