从所给的四个选项中，选择最合适的一个填入问号处，使之呈现一定的规律性：（）.
A.A
B.B
C.C
D.D
参考答案：B
用所给词的适当形式填空。
1. Mr. Li _____ (make) maths so easy when he was a teacher.
2. The supermarket is too _____ (crowd), and I don't enjoy it.
3. Does your sister enjoy _____ (do) homework with you?
4. The Greens _____ (go)to South Africa to watch soccer games last year.
5. The relaxing music made the patient(病人) _____ (feel) better.
对钢结构防火涂料进行检查时，室内裸露钢结构、轻型屋盖钢结构及有装饰要求的钢结构，当规定其耐火极限在（）及以下时，宜选用薄涂型钢结构防火涂料。
A.1.00h
B.1.50h
C.2.00h
D.2.50h
