---Where is your father?---He isn’t here. He __________ Yushu to help the people in trouble.
#41976
A
has gone to
B
has been to
C
went
D
is going
推荐题目
Look! The Greens _______ in the room.
#41799
A
reads
B
were reading
C
are reading
D
read
Great changes ________ in China since the People’s Republic of China _________ in 1949.
#36363
A
have taken place; was founded
B
has taken place; was founded
C
have been taken place; founded
D
took place; founded
We __________ in the same school since three years ago. 
#38230
A
study
B
were studying
C
will study
D
have studied
Listen! Mary           in the next room.
#39219
A
sings
B
is singing
C
sang
D
sing