________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
I wrote to my parents once a week,____ I was too busy with my teaching work.
#80142
A
it
B
unless
C
when
D
as
Hard _____ he tried, he failed to catch up with the first runner.
#32786
A
although
B
as
C
while
D
when
____________ many times, but he still couldn’t understand it.
#32349
A
Though he had been told
B
Having been told
C
Having told
D
He had been told