We are deeply impressed by the goal from the conference the average income will double by the year 2020.
#68108
A
that
B
which
C
what
D
whose
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There is some doubt _________ Mr Zhang will sign the contract with us.
#69318
A
when
B
whether
C
if
D
that
I cannot hear the professor clearly as there is too much noise _____ I am sitting.
#67482
A
that
B
where
C
who
D
what
Some researchers believe that there is no doubt___ a cure for AIDS will be found.
#74636
A
which
B
that
C
what
D
whether