( )many times, but he still could not rem

( )many times, but he still could not rem （）many times,but he still could not understand it. ___ many times but he still could not understand it.(tell) ______ many times,he still could not understand it. 有点小疑惑------many times,he still could ( ) many times,but he still couldn't remember . ____ many times but he still couldn't understand it ___ ,but he still could not understand it ____ but he still could not understand it. —— many times,I still could not understand how to operate th he had been told many times but he still couldn't understand 高中英语单选几道.1.________A_ many times,but he still couldn’t under