---John, why are you so upset? ---I my cell phone all morning but it is nowhere to be found.
#101303
A
am looking for
B
have looked for
C
have been looking for
D
had looked for
推荐题目
—Do you think we should accept that offer?—Yes, we should, for we _________ such bad luck up till now, and time _________ out.
#104592
A
have had; is running
B
had; is running
C
have; has been run
D
have had; has been run
—How long _______ in Shanghai?—I will be there attending a conference and giving a speech, which will take about 3 days.
#102207
A
have you stayed
B
are you staying
C
do you stay
D
did you stay
. The reason for all the changes being made _______to us yet.
#103486
A
has not explained
B
has not been explained
C
did not explained
D
were not explained
Energy drinks are not allowed _______ in Australia but are brought in from New Zealand.
#101105
A
to make
B
to be made
C
to have been made
D
to be making
—Your colleague is speaking English with fluency.—It's no wonder．She ____ in the UK for a year as a visiting professor
#100404
A
worked
B
has worked
C
had worked
D
has been working