The old man is too tired _________ go any further.
#50596
A
enough
B
can’t
C
to
D
so
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We should wear special boots __________ us floating away into the space .
#48510
A
to prevent
B
preventing
C
prevent
D
prevented
The baby stopped     and began    . 
#50542
A
to cry, laughing
B
to cry, laughed
C
crying, to laugh
D
cried, to laugh