---Where’s your mother?   ---Oh, she ______ Shanghai on business. 
#44748
A
have been to
B
have gone to
C
has been to
D
has gone to
推荐题目
English _____in many countries, but Chinese _____their own language.
#44399
A
is spoken, speaks
B
speaks, is spoken
C
is spoken , speak
D
is spoken, is spoken
--Are you often          on vacation?   -- Not always.
#44642
A
relax
B
relaxing
C
relaxed
D
to relax
Now computers _________ all over the world .
#44607
A
is used
B
are using
C
are used
D
have use
Stamps ______ sending letters.
#45020
A
used to
B
are used to
C
are used for
D
are using