A:①②
B:①④
C:②③
D:②④
Although my ideas, he didn't come up with his own.
胡萝卜先生的胡子刚好在风里飘动着。___这绳子够长了___就是不知道够不够牢固___小男孩说完就扯了扯胡子,他确定足够牢固,就剪了一段用来放风筝。