He made another wonderful discovery, ______ of great importance to science.
#92237
A
which I think it is
B
which I think is
C
which I think
D
I think which is
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   , I think, and all the problems could be settled.
#94958
A
If you make more efforts
B
Making more efforts
C
A bit more effort
D
To have made more efforts
I prefer _____ at home to _____ outside.
#94699
A
staying; playing
B
to stay; play
C
staying; play  
D
to stay; playing
 I am lucky ______ the thing I enjoy doing most is ______ I've ended up doing.
#95021
A
when... that
B
if...what
C
that... what
D
that... that