1．(2015·南京师大附中一模)As time goes by, I’ve learned that ________ kind is more important than being right.
A．to be B．being
C．having been D．be
2．(2015·淮安第一次调研)________ how the machine works, you need to have some knowledge of physics, which is important.
A．To understand B．Having understood
C．Understanding D．Understood
