Watching the online open courses of some famous European and American universities _______a new fashion among white collars in China over the past few months.
#102958
A
became
B
had become
C
has become
D
becomes
推荐题目
—Look! Somebody the sofa.—Well, it wasn’t me. I didn’t do it.
#101195
A
is cleaning
B
has cleaned
C
was cleaning
D
had cleaned
The past two years _______ a sharp rise in oil price，which adds to the burden of auto transportation industry.
#100085
A
witnessed
B
witnesses
C
is witnessing
D
has witnessed
--Did you listen to the report last Friday?--- Yes, it was about the shortage of migrant workers. That was the first time I______ about the subject.
#100377
A
heard
B
was hearing
C
would hear
D
had heard
—By the way，have you moved into the new house?—Not yet．The walls ________．
#99379
A
were painted
B
are being painted
C
are painted
D
are painting
The hotel wasn't particularly good，but I ________ in many worse hotels.
#100427
A
was staying
B
stayed
C
would stay
D
had stayed