______ time went by, his illness was getting worse.
#32345
A
During
B
If
C
With
D
As
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Our country is developing at an amazing speed, which is _____makes me feel so proud.
#31826
A
that
B
why
C
what
D
where
Many people say they love birds, but some plant trees _________ some make cages.
#34093
A
until
B
though
C
unless
D
while
The companies are working together to create ______ they hope will be the best means of transport in the 21st century.
#79776
A
which
B
that
C
what
D
who