________they visited the Science Museum，they showed great interest in everything they saw.
#30703
A
The first time
B
For the first time
C
At first
D
At the first time
推荐题目
We'll have a picnic in the park this Sunday ________ it rains or it's very cold.
#30680
A
since
B
if
C
unless
D
until
.It will not be ________ we can meet again.
#33845
A
long before
B
before long
C
soon after
D
shortly after
I think going swimming in my spare time, _____ I think is great fun and good exercise as well as a useful skill.
#34727
A
which
B
as
C
that
D
what