both different/the same both like each other always/usually/often ... play football/basketball... help people cross the street/carry the bags
I am…… .……is/are my good friend/friends. We ……
我国不少山脉走向不仅控制了主要河流的走向，还是这些河流的分水岭，如长江与黄河的分水岭为（ ）
