I won’t tell the student the answer to the math problem until he ______ on it for more than an hour.
#104700
A
has been working
B
will have worked
C
will have been working
D
had worked
推荐题目
It was the first time that I _______ visitors since I’d moved to London.
#102132
A
had had
B
have had
C
have
D
had
The lady insisted that the young man _____her wallet and _____to the police station at once.
#100183
A
had stolen; be sent
B
should steal; sent
C
has stolen; sending
D
steal; had been sent
(2011·湖南)One－third of the country ________ covered with trees and the majority of the citizens ________ black people.
#99565
A
is；are
B
is；is
C
are；are
D
are；is
—What does the sign over there read?―“No person ______ smoke or carry a lighted cigarette，cigar or pipe in this area．”
#104833
A
will
B
may
C
shall
D
must
—I have got a headache.—No wonder.You___in front of that computer too long.
#104063
A
work
B
are working
C
have been working
D
worked