The classroom is big enough for 25 students for normal use         you need more space for special activities.
#33192
A
once
B
because
C
if
D
unless
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      I toured the Great Wall,I was deeply impressed with the beautiful scenery.
#29943
A
For the first time
B
At first
C
The first time
D
It was the first time
He’d arrived20 minutesearly______I can have time for a cup of tea.
#80551
A
as soon as
B
as a result
C
in case
D
so that