Their classroom is as______ as ours．（ ）
| A． |
cleaner |
B． |
clean |
| C． |
the cleanest |
D． |
much cleaner |
We on the playground when it began to rain．（ ）
| A． |
ran |
B． |
were running |
| C． |
run |
D． |
have run |
Look at the sig． You take photos here．（ ）
| A． |
couldn't |
B． |
needn't |
C． |
mustn't |
D． |
won't |
In China， we always use red paper for Hongbao red means luck．（ ）
| A． |
until |
B． |
if |
C． |
although |
D． |
because |
I very busy studying for my exams since last month．（ ）
| A． |
am |
B． |
was |
C． |
will be |
D． |
have been |
Mike， do you go to work？
I take a bus to my office every day．（ ）
| A． |
how |
B． |
why |
C． |
when |
D． |
where |