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 |
When I was walking in the street, I heard my name ___.
| A．to call | B．calling | C．call | D．called |
We ___ to the farm last week.
| A．had | B．needed to | C．didn’t | D．had to go |
You’ ll feel better as long as you ___ the doctor’s advice.
| A．ask for | B．give | C．follow | D．understand |
I can’t find my English book. I must ___ it at home this morning.
| A．forget | B．leave | C．have forgotten | D．have left |
--Who did you ___ in the street last Sunday?---Lin Tao, a good friend of mine.
| A．run away | B．run for | C．run into | D．run after |