Miss Liu said ______ she would leave the message on the headmaster’s desk．
A．what B．which C．where D．that
－______ a visit to Beijing this summer holiday?
－That’s a good idea!
A．Why not B．Let’s
C．Shall we D．What about
These animals are in danger．We should think ______ to protect them．
A．how we can do B．how can we do
C．what we can do D．what can we do
Either you or I ______ going there tomorrow．
A．is B．be C．are D．am
Our English teacher is kind ________ helpful.
A．and B．or C．but D．so
As a doctor, you can’t be ________ careful．
A．to B．too C．also D．very
