Many tall buildings _______ in Shanghai in the past few years.
#101297
A
has been built
B
have built
C
were built
D
have been built
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Sales of CDs have greatly increased since the early 1990s, when people_____to enjoy the advantages of this new technology.
#104613
A
begin
B
began
C
have begun
D
had begun
—Can you tell me what time the flight to Detroit leaves?—I’m sorry, but it _______________.
#100400
A
has been canceled
B
had been canceled
C
has canceled
D
had canceled
When and where to go for the on-salary holiday _____ yet.
#103343
A
are not decided
B
have not been decided
C
is not being decided
D
has not been decided
Since then the number of people taking driving lessons______20%.
#100850
A
has increased to
B
increases by
C
has increased by
D
have increased