--- 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
---        you           the cat?---Yes, I have. ---When         you        it? ---Ten minutes ago.
#41971
A
Did, feed; did, feed
B
Have, fed; have, fed
C
Did, feed; have, fed
D
Have, fed; did, feed
He said that light ______much faster than sound.
#42284
A
has travelled
B
went
C
travels
D
travelled
The plane ______ when we got to the airport.
#42861
A
had taken off
B
was taken off
C
will take off
D
is taking off