用括号内所给单词的适当形式填空：1、 Nr Brown often -----(push) his son to do

用括号内所给单词的适当形式填空：1、 Nr Brown often _____(push) his son to do his homework2、i'm sorry .i forget __ (return) the book to you yesterday.3、Gina ____(fail) her chemistry test ,which made her mother angry .4、The head of the computer company ____(send) Cathy to shanghai last week .