语法词汇练习 语法大全 语法详解 英语听力 
---Why is the classroom so dirty? --- Sorry, sir. It ______ yesterday. We forgot to do it.
#44831
A
doesn’t clean
B
didn’t clean
C
isn’t cleaned
D
wasn’t cleaned
下一题
推荐题目
The dogs were made __________ as fast as they could.
#44740
A
run
B
ran
C
running
D
to run
Driving after drinking wine         in China.  
#44968
A
allows
B
doesn't allow
C
is allowed
D
isn't allowed
 Much more attention should_______ when we have exams.
#44550
A
pay to
B
be paid to
C
be paid
D
pay
—Do you plant trees in spring, Mike?—Yes. Many trees ________ in our city every year.
#44650
A
plant
B
are planting
C
have planted
D
are planted
The light bulb ______ by Edison in the middle of the 1780s.
#44649
A
is invented
B
was invented
C
invented
D
invent