--- Where is your mother?--- She _______ to Sichuan on business. She has ______ there four times recently. 
#40456
A
has gone; gone
B
has been; been
C
has gone; been
D
has been; gone
推荐题目
It is said that potato chips ____________ by mistake about a hundred years ago.
#41556
A
invent
B
invented
C
are invented
D
were invented
—Where is Sally?—Oh, she      in the art room.
#39075
A
draws
B
drew
C
is drawing
D
can draw
I        in this city since I        five.
#39926
A
have lived ; was
B
live ; was
C
have lived ; have been
D
live ; have been