We cannot figure out ________ quite a number of insects, birds, and animals are dying out.
#73021
A
that
B
as
C
why
D
When
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A survey was carried out on the death rate of those who were infected by SARS, ________were surprising.
#73301
A
as results
B
which results
C
the results of it
D
the results of which
The idea has been widely accepted______Beijing Opera should be added to the basic education in China.
#72939
A
which
B
when
C
that
D
/
The book was written in 1946, ____ the education system has witnessed great charges.
#73220
A
when
B
during which
C
since then
D
since when
He turns deaf ear to his parents, many times they have pointed out his weaknesses.
#68717
A
whatever
B
whichever
C
whenever
D
however