1.My mother often ask me _____ when Idon't feel well.

1.My mother often ask me _____ when Idon't feel well.
A.what the matter is
B.what is wrong
C.what the problem is
D.what wrong is
2.I never seem to lose any weight,_____ hard I try.
A.even though B.no matter what C.as if D.ever since
3.Is this the museum_____ you visited the other day
A.that B.where C.in which D.the one
4.______ the window,my hard was cut unexpectedly.
A.Cleaning
B.To clean
C.While cleaning
D.While I was cleaning