The best times to visit Shangri-la are spring and autumn ___ the temperature is at its mildest.
| A．where | B．on which |
| C．when | D．in that |
_________to reach them on the phone, we sent an email instead.
| A．Fail | B．Failed | C．To fail | D．Having failed |
—Come on, please give me some ideas about the project.
—Sorry. With so much work my mind, I almost break down.
| A．filled | B．filling | C．to fill | D．being filled |
A small plane crashed into a hillside five miles east of the city, _____ all four people on board.
| A．killed | B．killing | C．kills | D．to kill |
I still rememberto the Famen Temple and what I saw there.
| A．to take | B．to be taken | C．taking | D．being taken |
We are invited to a party _________in our club next Friday.
| A．to be held | B．held | C．being held | D．holding |