Children’s brains can’t develop properly_______ they lack protein.
#79950
A
when
B
since
C
because
D
unless
推荐题目
.The Forbidden City is an area ＿＿ once only the emperor, his family and officials were allowed.
#34335
A
which
B
who
C
where
D
whose
Information technology is taught in most schools，________ we have entered the information era.
#30468
A
so
B
while
C
for
D
still
The popularity of films such as Jurassic Park, a scientist clones several kinds of extinct dinosaurs, proves how the idea struck a mixture of fear and excitement into people’s hearts.
#34236
A
which
B
what
C
in which
D
that
These natural parks are important for preserving animals, which would ________ risk dying out.
#31895
A
merely
B
rather
C
otherwise
D
moreover
There’s no way of knowing why one man makes an important discovery ________ another man, also intelligent, fails.
#31181
A
since
B
if
C
as
D
while