---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
Don’t stand up until you ____________.
#44883
A
tell to
B
are told
C
are told to
D
are told to do
The monkey was seen _________off the tall tree.
#44572
A
jump
B
jumps
C
jumped
D
to jump
The television ________. It doesn’t work now.
#44544
A
must repair
B
was repairing
C
must be repaired
D
has repaired