He could find the way home ____ he was only three years old．（ ）
| A． |
though |
B． |
because |
C． |
where |
D． |
if |
Cindy， it's very nice _____________you to lend me your car． It helps me a lot．
It's my pleasure．（ ）
| A． |
with |
B． |
of |
C． |
for |
D． |
to |
There is a mistake in your sentence．
Oh， I see． I've dropped _____________"u" in the word "usually"．（ ）
| A． |
a |
B． |
an |
C． |
the |
D． |
/ |
Mum， I feel lonely because I don't have anybody to play with． May I keep a dog？
____________We aren't supposed to keep any pets in the tall building．（ ）
| A． |
Why not？ |
B． |
I hope so． |
| C． |
Anything else？ |
D． |
I'm afraid not． |
I bought my mother some flowers on Mother's Day．（ ）
A．直接宾语B．间接宾语C．表语D．状语
It is our duty to protect the environment．（ ）
A．直接宾语B．间接宾语C．形式主语D．真正主语