—Why do you look so puzzled?—Oh，I ________ over a most difficult maths problem.
#99720
A
thought
B
have thought
C
am thinking
D
think
推荐题目
The reporter said that UFO from east to west when he saw it.
#100917
A
was moving
B
is moving
C
move
D
moves
One of the most famous monuments _____the country by France.
#103301
A
was presented to
B
was presented with
C
was awarded to
D
was awarded with
With the development of science,more new technology to the fields of IT.
#104546
A
has introduced
B
is being introduced
C
is introduced
D
was introduced
I can sleep for 7 hours every day now, but if I take that job, I ____less time for sleep.
#101542
A
had
B
haven’t had
C
will have
D
wouldn’t have
My headache _________ me．I thought it was going away, but it’s getting worse and worse．
#103389
A
killed
B
kills
C
is killing
D
was killing