问题
填空题
用所给词的正确形式填空。
1. His father worked for twenty hours without_____ (stop).
2. Norman Bethune will _____ (miss) by Chinese people forever.
3. Mother bought enough food_____ (feed) our dog.
4. Einstein's letter asked people_____ (give) up nuclear weapons.
5. Now he is working on _____ (develop) new machine.
答案
1.stopping 2. be missed 3. to feed 4. to give 5. developing
