—The window is dirty.—I know. It ______ for weeks.
#102943
A
hasn’t cleaned
B
didn’t clean
C
wasn’t cleaned
D
hasn’t been cleaned
推荐题目
Jack and Mike were found cheating in the exam, and_______by their teacher at the moment.
#101248
A
were scolded
B
are being scolded
C
have been scolded
D
were being scolded
That tests can actually give measurement of the language skills of the students_______ by many teachers.
#100421
A
questioned
B
are questioned
C
is questioned
D
questioning
----Are you a teacher? ----No, but I ______ in Harbin No. 3 High School for 3 years.
#100004
A
had taught
B
has taught
C
teach
D
taught
—How long ____ you ____ in Singapore?—For just the weekend． I’ll be back next Monday morning．
#101595
A
have; stayed
B
are; staying
C
did; stay
D
do; stay
Over the past decades, the population in this country because of the rising birth rate, immigration and the declining death rate.
#99064
A
has been increasing
B
have been increasing
C
had increased
D
have increased