（ ）He spent about twenty-three _____.
A. week B. hour C. hours
Listen and choose
你将听到一个句子，根据你所听到的内容, 选择相符合的一项，并将其字母编号填在题号前的括号内，每小题将读两遍。(每小题1分，共10分)
补全对话。（5%）
A:last Sunday?
B: Yes, I did. My classmates and I went to plant trees.
A: How did you plant trees?
B: First, we in the ground. Then, we
and put them into the holes.
After that, we . We watered the young trees.
A:?
B: Yes, they are. They can stop the wind and they can make the air fresh and clean.
A: We should plant more trees.
The White House is in .
A. France B. China C. Washington
Our teacher always tells uswaste water.
A. to not B. not to C. not
We should turn the lights when we leave the room
A. on B. off C. in