___ the elm and oak are to England, the olive is to Italy.
A.what   
B.where
C.whatever
D.which

I am wondering ___ I could use this dictionary.
A.if
B.that
C.which
D.what

Most of the classmates couldn't come. He invited them to the birthday party
A.Most of the classmates he invited to the birthday party couldn't come.
B.Most of the classmates he was invited to the birthday party couldn't come.
C.Most of the classmates that he invited them to the birthday party couldn't come.
D.Most of the classmates which he invited to the birthday party couldn't come.

He likes the dress. Huong is wearing it
A.He likes the dress which Huong is wearing it
B.He likes the dress Huong is wearing it
C.He likes the dress who Huong is wearing
D.He likes the dress Huong is wearing

We were given a lot of information, most of ____ was useless.
A.which
B.that     
C.them   
D.it

Ann, ___ lives next door, is very friendly.
A.who
B.she      
C.which
D.whose

Mexico city, ___ has a population of over 10 million, is probably the fastest growing city in the world.
A.which
B.whose
C.that
D.A&B are correct

I have seventeen students, most of ___ speak English very well.
A.who
B.those
C.whom
D.which

Picasso, ___ works inspired many artists, lived until he was a ripe old age.
A.that whose
B.whose
C. his
D.which

The party, ___ I was the guest of honor, was extremely enjoyable.
A.at which
B.by which
C.for which
D.to which