The boy tried his best to make himself         in his         English.
#97083
A
understood; breaking
B
understand; breaking
C
understand; broken
D
understood; broken
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The speech which he made ______ the football match bored a lot of fans to death.
#94898
A
being concerned
B
be concerned
C
concerned
D
concerning
I would appreciate _____ it a secret.
#96686
A
your keeping
B
you to keep
C
that you keep
D
that you will keep
 Though ______, many laws of nature exist.
#97974
A
not having been discovered
B
having not been discovered
C
not having discovered  
D
having not discovered