根据下面对话中的情景， 在每个空白处填入一个适当的语句，使对话恢复完整 。
A: Alice , 66. ______________________ when the fire started ?
B: I was studying in the library .
A: Did you smell the smoke ?
B: 67. ____________________ , but Meimei did .
A: Where was she ?
B: 68. _____________________ in the gym .
A: 69. _____________________
B: John was eating lunch in the dining room . Where were you ,Dong ?
A: I was talking on the phone .
B: 70. _________________________
A: I called the fire department .
B: Good for you .
Remember to ________ （洗） your hands before eating, boys and girls.
Now, ________（老虎） are in danger. Let’s do something for them.
Of the four seasons, I like ________ （春天） best.
Spacewalks can be dangerous. There is no air in space. And it’s filled with ________（有害的）radiation（辐射）.
The students are often ________（分开）into several groups by the teacher before discussing the difficult questions in class.