I want to buy some . [ ]
A. book
B. a book
C. books
D. a books
答案：C
看图，判断句子对(√)错(×)。
( ) 1. I like fruit.
( ) 2. I do my homework in the afternoon.
( ) 3. Whose dress is this?
( ) 4. Let's play ping-pong.
防垢剂一般在注水站加入，也可（）投药。
A.综合
B.单独
C.不
D.大量
I like fruit. 
I do my homework in the afternoon.
Whose dress is this?
Let's play ping-pong.