First she plays(6)piano and we sing(7)it.选择:6处选A./ B.the C.a 7处选A.after B.for C.at(并解释)
问题描述：
First she plays(6)piano and we sing(7)it.选择:6处选A./ B.the C.a 7处选A.after B.for C.at(并解释)
答
6 A
play piano 是固定搭配，表示弹钢琴
如果是play a piano 是玩一部钢琴，play the piano 玩那部钢琴
7 C
sing at it 和着琴声唱歌
after it 等琴声过后再唱
for it 为了琴声而唱
答
(6)B
play +the +乐器
(7)A
意:...之后.因为前面出现 First