There’s a feeling in me  _______we’ll never know what a UFO is—not ever.
#66670
A
that
B
which
C
of which
D
what
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     , and you will realize your dream of being successful.
#66838
A
Making great efforts
B
To make your efforts
C
A bit more effort
D
If you double your efforts
He said that the key _____ to open the door had been lost.
#74391
A
with what
B
with it
C
with that
D
with which
He won’t wear a hat _____.
#68336
A
however cold it is
B
how cold it is
C
however it is cold
D
however cold is it