_A container weighs more after air is put in, ____proves that air has weight.
#80057
A
as
B
it
C
that
D
which
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I developed very slowly and it took nearly two hundred years I was built as an analytical machine by Charles Babbage.
#33100
A
before
B
after
C
long
D
short
_____ you are in a speech contest or you are giving a talk in class, a little preparation will make your presentation organized and dynamic.
#31939
A
Either
B
On condition that
C
No matter
D
Whether
Although he knew little about the large amount of work done in the field , he succeeded ____other more well-informed experimenters failed.
#80107
A
as
B
unless
C
what
D
where