1. _______ our classroom once a week is necessary不知道选A还是D,因为动名词和不定式都可以做主语,我个人认为选A
A. Cleaning B. Clean C. Cleaned D. To clean
2. He promised______ a doctor for my son.我认为选B,不知道对不对
A. me to get B. that he got me C. me getting D. me that he got
3. Last night I was so tired that I fell asleep soon. I didn't hear him_______ in.
A. coming B. came C. to come D. come
到底是用ing还是原形?hear sb do和hear sb doing 都可以的,分不清楚