_______ his return from America, he got down to his research.
#92169
A
While
B
In
C
As
D
On
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Excellence is not difficult ---simply decide right now to give it your best shot---____you will be amazed with ___ life gives you back.
#93016
A
and; what
B
but; that
C
but; whose
D
and; whose
You had better_________because you have to drive back home.
#93139
A
not drinking
B
not drink
C
don’t drink
D
not to drink
When ______ comes to research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.
#93492
A
that
B
it
C
this
D
what
You can never imagine what great difficulty I have _____ your house.
#94790
A
found
B
finding
C
to find
D
for finding