2013
高考英语上海市虹口区单项选择专题训练(07)及答案(非谓语动词) 非谓语动词与with复合结构 16. while talking about his own happy childhood, ______ on his face. a. a smile appeared b. he was wearing a smile c. a smile was seen d. we saw a smile 17. as a father of two young girls, he knows the difficulties of keeping kids ______. a. to entertain b. entertaining c. entertain