1 . 选词填空。

who     which     whose     when     where     why

1. This is the reason ________ my parents got home earlier.
2. Those ________ want to go to English party must be at the school gate by 7:30 p.m.
3. The children ________ parents could not be found were looked after by neighbors and friends.
4. I remember the day ________ German was no longer hard for me.
5. A typhoon is an extremely strong wind ________ often happens in the Western Pacific Ocean.