The poor child stood there, and ________ what to do, turned to his father for help.   
#11627
A
not knowing
B
not knew
C
not to know
D
not know
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physics
#10575
A
pleasure
B
music
C
sure
D
increase
--What do you think of Harry, our new classmate?--I am not sure, but he is always asking ______ questions. 
#14146
A
a great many of
B
a great many
C
a great number
D
a great amount of
Hearing the interesting story, all the people present_______.
#11291
A
burst into laughing
B
burst into laughter
C
burst out laugh
D
burst out laughter