It is reported that there are various reasons _____more and more people feel depressed at this time of year.
#69394
A
why
B
when
C
what
D
how
推荐题目
 The scientist, __________ my father works, is about 50.
#66953
A
on whom
B
to which
C
with which
D
with whom
The factory was built in a secret place, around _________ high mountains. 
#73444
A
which was
B
it was
C
which were
D
them were
They will telephone the police and complain about it       the noise     .
#41174
A
if; stops
B
unless; stops
C
if not; stops
D
unless; doesn’t stop