---I have got a headache．----No wonder ．You _______in front of that computer too long ．
#102512
A
work
B
are working
C
have been working
D
worked
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Bob ________ with us together since he came to our school.
#101237
A
have worked
B
has worked
C
worked
D
will work
----You haven’t said a word about the design ,Mike. What’s your idea?----I’m sorry I _______ about something else just now.
#103591
A
am thinking
B
thought
C
was thinking
D
had thought
Various efforts over the centuries _________ to predict earthquakes to reduce the damage.
#99978
A
are being made
B
have been made
C
were made
D
were being made
They ________ to go shopping in the downtown district, but they cancelled it because of a hard rain.
#99209
A
had intended
B
intended
C
have intended
D
were intending