---Do you know __________this letter is from?
A.which B.what C.how D.whom
---Tom, is your mother at home? --No, she __________Beijing on business .
A.has been to B.has gone to C.has been in D.went to
Please pay __________to what I am saying in class.
A.connection B.introduction C.attention D.conversation
There is a new supermarket near my home, and I think it is __________for me to go shopping.
A.difficult B.crowded C.impossible D.convenient
Don't be worried, just regard the problem __________a challenge.
A.in B.as C.from D.of
As we all know, France is __________European country.
A./ B.the C.a D.an
