1. 表示感觉和心理状态的动词，如 hear, feel, find, give, listen to, look at, notice, observe, see, smell, watch等词的宾语可以用-ING作宾语补语
21) “Where are the children?” “I saw in the yard.”
［A］ them to play ［B］ them played ［C］ them playing ［D］ to them playing
22) I must say I don’t like to hear you like that.
［A］ talking
［B］ to talk
［C］ have to talk
［D］ talked
2. 表示“致使”等意义的动词，如 catch, have, get, keep, leave, set
I am sorry to have kept you waiting for me so long.
What you have told left me thinking that you experienced much when you were young.
3. 其他动词宾语的补语
23) The average age ［A］ of the Mediterranean ［B］ olive trees grow ［C］ today is two hundred years ［D］ .