By the time I got to the bus stop, the bus .
A、has already left B、already left C、had already left
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 |