1.He studied hard in his youth,_______ contributed to his great success in later life.

1.He studied hard in his youth,_______ contributed to his great success in later life.
A.that B.it C.what D.which
2.The only thing ______ matters is to return home safe and sound.
A.which B.that C.what D.but
3.He is the most boring teacher ______.
A.which I've ever met B.that I've ever met
C.who I’ve ever met D.with whom I’ve ever met
4.I am very grateful to you for what you’ve given me and ______ you have done for me.
A.which B.that C.all what D.all that
5.His girl friend,______ name I forgot,was a singer.
A.which B.her C.whose D.that
6.She brought with her two friends,______ I had ever met before.
A.either of them B.neither of that C.neither of whom D.both of them
7.We then moved to LA,______ we lived for five years.
A.which B.where C.and D.there
8.He is the only one of the children in the family ______ go to college.
A.that intends to B.that intend to C.who intends to D.who intend to
9.My wife never admits her mistakes,___ is extremely annoying(使人恼火的).
A.which B.that C.what D.this
10.My parents will do ______ to help me.
A.which they can B.anything which they can
C.that they can D.anything they can