【自学探究】
一、用所给动词的适当形式填空。
1. With the medicine box under her arm, Miss Zhao ______(hurry) off to look after the man.
2. Jim ______(make) many friends since he ______(come) to China.
3. They ______(know) each other for about ten years.
4. He ______ already ______(write) a letter to the factory to ask them to stop making noise.
5. —When ______ she ______(leave)?
—Two hours ago.
