I will never forget the day _______ I came to my university and the day ______  I spent in a new city. 
#4966
A
when; which
B
which; when
C
what; that
D
on which; when
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Whoever _____ a new idea of how to work out the puzzle will be given a prize.
#4660
A
comes up
B
comes up with
C
comes out with
D
comes with
.Every year in April, the Water Festival ______ among the Dai people in Xishuangbanna.
#4782
A
celebrates
B
is celebrating
C
is celebrated
D
is being celebrated
It is generally believed that teaching is ___________it is a science. 
#4916
A
an art much as
B
much an art as
C
as an art much as
D
as much an art as
He is_______to have come back from the abroad.
#4799
A
possibly
B
possible
C
probable
D
likely