问题补充:
he took plane, he was frightened to cry.
A. First time
B. At the first time
C. For the first
D. The first time
答案:
A. First time
B. At the first time
C. For the first
(答案→)D. The first time
解析:句意:他第一次坐飞机吓哭了。因为逗号前后都是句子,所以这里应该用连词。除了一些从属连词引导时间状语从句之外,一些词组也可以引导,这时它们就当连词用,其中表示第一次时用The first time,它引导的是时间状语从句,其它的选项不能当连词用,故选D。