______ time goes on,people ______ better housing and jobs.
#80131
A
When;want
B
While;need
C
As;demand
D
Since;ask
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 ___I saw him, his humor impressed me.
#30523
A
The first time
B
At first
C
It was the first time
D
For the first time
________ several times,but he still doesn't know how to do it correctly.
#30467
A
Although I've taught him
B
I've taught him
C
Having been taught
D
Having taught