I think table tennis is _______ boring.  
#46726
A
kind of
B
all kinds of
C
a kind of
D
kinds of
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Staying up late is _______ your health.
#46912
A
bad for
B
good to
C
bad to
D
good for
The boy is ________ to look after his sister.
#45748
A
enough old
B
enough young 
C
young enough
D
old enough
—What do cows eat? —They eat__________ grass.
#45976
A
most
B
mostly
C
almost
D
main