1.I think it's a good way ( )a foreign language
1.I think it's a good way ( )a foreign language
A.to learn B.learning C.by learning.
2.( )the words helps a little in learning English
A.Memorizing B.By memorizing
3.this is to say
4.understand doing 还是 understand to do 还是 understand do?
(1、2题请还要说明为什么选择那个答案)