题目

动词填空：用括号内所给动词适当形式填空。 1. Many families can’t afford ____________(buy) new houses because of the high prices. 2. My aunt ___________(teach) English in that school for nearly 20 years. 3. Only two patients ___________(operate) on by the famous doctor the day before yesterday. 4. They are busy doing all they can ___________(cure) the blind boy. 5. _______ the men __________(carry) the goods to the village when it suddenly began to snow? 6. Many traffic accidents can __________(prevent) if the drivers are careful enough. 7. The children will give已知一个角的补角等于这个角的余角的4倍, 求这个角的度数.