Only when _________________________.
| A．did he arrive the meeting began |
| B．he arrived the meeting began. |
| C．did he arrive did the meeting begin. |
| D．he arrived did the meeting begin. |
The best times to visit Shangri-la are spring and autumn ____ the temperature is at its mildest.
| A．when | B．where | C．that | D．which |
When we got up this morning, we found the sun rose, ____ it always does, in a clear sky.
| A．what | B．which | C．if | D．as |
Do you think it is worth ____ your life for adventure?
| A．to risk | B．risked | C．risking | D．risk |
We’ll live with the local people in their villages, and eat and drink whatever they ____, including cow’s blood.
| A．will | B．do | C．can | D．are |
I still remember that terrible accident a few days ago, ____ more than 20 pupils were killed.
| A．where | B．that | C．on which | D．which |