. 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
推荐题目
-- Did you visit your grandparents yesterday?--Yes, and when I got there, they _____ in the fields .
#99940
A
worked
B
have worked
C
were working
D
had worked
Gary Locke , a Chinese-American, once______ as the governor of Washington for 8 years and now is U.S. Commerce Secretary．
#102093
A
had worked
B
worked
C
is working
D
has been working
—Tomorrow ____ my birthday. I’d like you and Jane to come. —I’m not sure if she ____ free.
#104204
A
will be; is
B
is going to; is
C
is; is
D
is; will be
Before ___ a loan ____, calculate (核算) your monthly costs.
#100826
A
taking; off
B
taking; away
C
taking; out
D
taking; over