(B)根据句意,在答卷对应题号的横线上,写出括号内所给单词的适当形式。
（1）、Do you think that true(friend) is more important than money?
（2）、They didn't speak clearly enough to make (they) understood.
（3）、We should never speak to the elderly(polite).
（4）、On her(forty) birthday, she received a gift from her mother.
