-What's up? You look worried.Well,I_____on the problem for 5 hours but I haven't got a single clue.
#100541
A
have worked
B
worked
C
will work
D
have been working
推荐题目
Luckily good things _________ here to save local wildlife.
#102513
A
are doing
B
are being done
C
had been done
D
will do
Since the epidemic appeared last winter, it ______ about a hundred lives.
#103370
A
takes
B
took
C
has taken
D
will take
．—Let’s throw a surprise party for mom’s 50th birthday.—That’s a good idea. We_________several of her friends.
#103771
A
invite
B
had invited
C
are inviting
D
will invite
（2014年福州市高三适应性练习）26. — Hi, Michelle, I can’t find my e-dictionary.— Sorry, I _________ it. I guess I put it on the top shelf with my things.
#99102
A
had used
B
am using
C
used
D
was using
—Do you know where Mary is?—No, I don’t. I ______ her since last Sunday night.
#100839
A
haven’t seen
B
didn’t see
C
won’t see
D
don’t see