As we know, penicillin became the greatest drug of the 20th century, ______ millions of lives.
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A
to save
B
saving
C
saved
D
Save
推荐题目
 _________working all day long, he fell asleep as soon as he lay on the bed.
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A
Getting tired of
B
Getting tired from
C
To get tried of
D
To get tired from
Passengers are permitted    only one piece of hand luggage onto the plane.
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A
to carry
B
carrying
C
to be carried
D
being carried
 I think this story is _____ .
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A
worth being read
B
worth reading
C
worth to read
D
worth of reading