Question

用适当的连接词填空

1.she did't catch the bus.that's ___ she was late for class.
2.he has to stay at home.this is ___ he has a bad cold.
3.the reason ___ he was upset was ___ he failed to pass the exam.

Answer 1

1.she did't catch the bus.that's why___ she was late for class.
2.he has to stay at home.this is because__ he has a bad cold.
3.the reason _why__ he was upset was _that__ he failed to pass the exam.

第一个是表语从句
第二个是表语从句
第三个前一个是定语从句，后一个表语从句，表语从句的that 不能省

Answer 2

why
because
why that