墙体砖按工艺不同可分为( )。
A．烧结砖和非烧结砖
B．蒸压灰砂砖和粉煤灰砖
C．黏土砖和粉煤灰砖
D．空心砖和实心砖
参考答案：A
根据句意和汉语注释，在答题卡标有题号的横线上，写出单词的正确形式。
1. Mr. Wu is our teacher. He teaches _____ (we) English.
2. Smoking is bad to people's _____ (healthy).
3. He likes swimming. He is a good _____ (swim).
4. The boy eats too many chocolates and sweet food, so his _____ (tooth) are getting worse.
They often have problems with______.
A．what will they be able to do
B．what they will be able to do
C．that will they have to do
D．that will they have to do
