----What’s the matter with you and your friend?
----She looks very busy. I want to help her, but I don’t know _____.
A.how to do | B.what to do it |
C.what to do | D.why to do |
----What’s the matter with you and your friend?
----She looks very busy. I want to help her, but I don’t know _____.
A.how to do | B.what to do it |
C.what to do | D.why to do |