Though he is busy he is very and makes a telephone call to his parents from time to time

问题补充：

Though he is busy, he is very and makes a telephone call to his parents from time to time and tries his best to spare some time to visit them.

A. constant

B. considerate

C. considerable

D. conscious.

答案：

A. constant

(答案→)B. considerate

C. considerable

D. conscious.

解析：词义辨析。 A. 不变的 B. 考虑周到的 C. 值得考虑的 D.自觉的。句意：尽管他很忙，他考虑的也非常周到，不时打个电话给他的父母……故选B.