问题
填空题
用所给单词的适当形式填空。
1. I built one of my rockets _____ (I)
2. I _____ (lose)one of my books yesterday.
3. Danny has been _____ (launch) rockets for two years.
4. —How _____ (much) pens do you have?
—Four.
答案
1. myself
2. lost
3. launching
4. many