With the help of high technology, in the past few years, electronic business __________          to bank industry, travel industry.
#103077
A
applied
B
have applied
C
had been applied
D
has been applied
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My son __________ his clock  when I went to get a cup I __________ in his study.
#103412
A
was winding up; had left
B
would up; had forgotten
C
had wounded; left
D
was winding up; forgot
Bob would have helped us yesterday, but he ________.
#99049
A
was busy
B
is busy
C
had been busy
D
will be busy