Ⅰ. 用所给动词的适当形式填空
1. It is necessary that our drinking water _____________ (make) cleaner.
2. It is high time that our child _____________ (learn) to do some housework.
3. My suggestion is that we _____________ (put off) the sports meet.
4. The workers in France demanded that their pay _____________ (raise) from the following week on.
