. Sales of CDs have greatly increased since the early 1990s, when people ________ to enjoy the advantages of this new technology.
#104797
A
begin
B
began
C
have begun
D
had begun
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— Are these seats available?— Sorry, sir. The seats _____.
#101222
A
have reserved
B
are reserved
C
reserved
D
are reserving
Before the first nonstop flight made in 1949, it_____ necessary for all planes to land for refueling.
#101489
A
would be
B
has been
C
had been
D
would have been
— Put these glasses away before they______. — OK, I’ll put them in the cupboard.
#101969
A
have broken
B
are breaking
C
get broken
D
will be broken
---Hi, let’s go skating. --- Sorry, I’m busy right now. I _______ in an application form for a new job.
#99093
A
fill
B
have filled
C
am filling
D
will fill
Many scientists believe sea levels ______ by more than one meter by the end of the 21st century.
#100381
A
will be risen
B
will have risen
C
will have been
D
will be rising