Bob would have helped us yesterday, but he ________.
#99049
A
was busy
B
is busy
C
had been busy
D
will be busy
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Stefan ________ from heart attack for more than ten years, but now he’s healthy and energetic.
#100871
A
had suffered
B
suffered
C
has suffered
D
has been suffering
When she ______ back tomorrow, I’ll tell her all about the news.
#101692
A
will come
B
comes
C
had come
D
is coming
 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
—Have you seen the movie “2012”?It’s quite thrilling.—No,I ________ to buy a ticket,but it ________ cats and dogs.
#99408
A
have intended;was raining
B
intended;had rained
C
have intended;rained
D
had intended;was raining