— Could we practice playing the guitar in the hall, Sir ?                  —No , ___________ you have the principal’s (校长) note.        
#55372
A
if
B
unless
C
because
D
since
推荐题目
They went on working ________the heavy rain.
#57960
A
as a result of
B
because
C
so that
D
in spite of
I collect stamps, I collect tickets, _____.
#58128
A
in fact
B
too
C
as well as
D
either
 Which of the following is RIGHT? 
#55520
A
In the early 19th century, the first trains began to carry passenger.
B
Dinosaurs lived on Earth more than 60 millions years before human beings.
C
The king ordered his men to collect a bag of rice.
D
There are many tiny computers around us, and we dependent on them nearly every day.