Glad to see you back. How long _______ in Russia?
#100486
A
did you stay
B
have you stayed
C
were you staying
D
have you been staying
推荐题目
—How are things going?—The disabled ________ no relatives in Guangzhou ________ by the volunteers, who will graduate from Zhongshan University next year.
#100913
A
with, are taking care of
B
have, will be taken care of
C
with, are being taken care of
D
have, are being taken care of
 ---Joan, what _______ in your hand  ? ---Look! It’s a birthday gift for my grandma.
#99802
A
are you holding
B
had you held
C
do you hold
D
will you hold
Much attention should ______ the environment and fighting against pollution.
#103646
A
be paid to protect
B
pay to protecting
C
pay to protect
D
be paid to protecting
—You haven’t got the textbook for my chemistry yet.—I know, and we ________ to get it for the last five weeks.
#100488
A
will have been trying
B
have been trying
C
will be trying
D
had tried