A．用适当的连接词填空
1．I have no idea ________we can do with these waste materials.
2．________the doctor really doubts is __________my mother will recover from the serious disease soon.
3．It is hoped __________nature will never be destroyed.
4．________do you guess will give a talk on English study tomorrow?
5．—I drove to Zhuhai for the air show last week.
—Is that ________you had a few days off?
【答案】1.what 2.What；whether 3.that 4.Who
5．why
