-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
When their first child was born, they _________ for three years.
#103499
A
had married
B
had been married
C
got married
D
had got married
(2013·高考江苏卷)—What about your selfdrive trip yesterday?—Tiring! The road is being widened，and we ________a rough ride.
#99700
A
had
B
have
C
would have
D
have had
-Has Tommy finished his homework yet?-I have no idea; he ____ it this morning.
#104683
A
was doing
B
had been doing
C
has done
D
did
They suggested that the library ________ open during the vacation.
#102904
A
was kept
B
would be kept
C
is kept
D
be kept
A new cinema _________ here now. They hope to finish it next month.
#99783
A
will be built
B
is built
C
has been built
D
is being built