In January, 2004, the United States successfully launched “Spirit”, a Mars Exploration Rover, _____ a new milestone in the history of mankind. 
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A
it marked
B
marking
C
marked
D
to mark
推荐题目
Few people will admit to ________ others.
#94578
A
have prejudice against
B
be prejudiced against
C
having prejudiced against
D
being prejudiced against
Though _____ money, his parents managed to send him to university.
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A
lacked
B
lacking of
C
lacking
D
lacked in
—What do you think made Mary so upset? —_______ her new bike. 
#98620
A
As she lost
B
Lost
C
Losing
D
Because of losing