—Haven’t seen Lucy recently. What’s happened?
—Oh, it’s more than two months ______ she worked here.
| A．before | B．after | C．since | D．when |
– Is everybody here?
– Not yet… Look, there ____ the rest of our visitors!
| A．comes | B．is coming | C．come | D．are coming |
Everyone, please remain ____ until the plane has come to a complete stop.
| A．seat | B．seated | C．seating | D．to seat |
I still remember ____ to the Summer Palace and what I saw there.
| A．taking | B．to take | C．to be taken | D．being taken |
The scientist’s many years’ careful observation ____ a surprising discovery.
| A．ran into | B．began with | C．led to | D．came from |
Don’t come and see me today – I’d rather you ____ tomorrow.
| A．to come | B．come | C．came | D．coming |