Mum，you really need to have a rest！You ________in the kitchen ever since you came back home three hours ago.
#99412
A
had worked
B
were working
C
have been working
D
worked
推荐题目
I ______ the time ______ so quickly.
#100103
A
didn’t realize; had passed
B
don’t realize; passed
C
haven’t realized; passed
D
hadn’t realized; had passed
If you have a job, yourself to it and you’ll succeed.
#101930
A
don’t devote
B
do devote
C
devoting
D
not devote
With an online course Lynn has over 300, 000 students all over China ____ her class through the Internet.
#100747
A
attending
B
attended
C
attend
D
are attending
This is the first time that I ______ the song Gangnam Style.
#101708
A
hear
B
are hearing
C
heard
D
have heard
Bats are surprisingly long-lived creatures, some____________ a life span of around 20 years.
#102033
A
have
B
had
C
to have
D
having