单项选择题

This is one of the most beautiful songs（）I have ever heard.

A．what
B．which
C．that
D．as

相关考题

The construction of the laboratory（）by the end of the y...

单项选择题The construction of the laboratory（）by the end of the year.

A．will complete
B．will have completed
C．will be completed
D．will have been completed

The patient knew nothing about his illness（）the doctor ...

单项选择题The patient knew nothing about his illness（）the doctor told him.

A．after
B．while
C．until
D．since