Ⅰ. 用括号中所给动词或短语的适当形式填空
1. More than a dozen students in the school ___________ (send) to study medicine last year. 
2. When and where to build a new hospital ___________ (decide) yet. 
3. ___________ the photo ___________ (develop) yet? If not, you’d better get it ready as soon as possible. 
4. The tickets ___________ already ___________ (sell) out. You won’t get one if you want.