– I have got a headache.  --No wonder. You ___in front of that computer too long. 
#103775
A
work
B
are working
C
have been working
D
worked
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---- If he_____ , he ______ that food.              ---- Luckily he was sent to the hospital immediately.
#102860
A
was warned; would not take
B
had been warned; would not have taken
C
would be warned; had not taken
D
would have been warned; had not taken
. Tom as well as his classmates __________ a song when the teacher came into the classroom.
#103734
A
are singing
B
were singing
C
is singing
D
was singing
What a big snake! It ________ one meter and a half in length.
#102850
A
is measured
B
is measuring
C
measures
D
will measure