--They have been to Australia. --_____. A. So do I B. So have I C. So did I
---Will there be more people in 100 years? --- __________, I hope.
Tom _______ his English book in the classroom last Friday.
I really don’t know____________.
It’s _______ to work out the math problem. You needn’t go to ask the teacher.
The blouse ______ me 200 yuan.