问题
选择题
All the clothes donated by the citizens need cleaning thoroughly before being sent to the earth-stricken area, ______ ?
A．needn’t they
B．don’t they
C．didn’t they
D．shouldn’t they
答案
答案：B
带有定语从句，宾语从句的主从复合句，疑问部分谓语根据主句的谓语而定。这里谓语是need需要，实意动词，一般现在时，主语为复数，故选B。