30. They appeared ____ me, so I had to explain to them.
| A．misunderstanding | B．misunderstood |
| C．to be misunderstood | D．to have misunderstood |
Many people _____ the opening ceremony of 2010 World Expo, which was so amazing.
| A．witnessed | B．participated | C．swallowed | D．handled |
This is the very book _____ I need now.
| A．what | B．which | C．that | D．all |
Not the way he did it but his words _____ criticized by people present.
| A．has | B．had | C．is | D．were |
With a lot of difficult problems_____， the newly-elected manager is in a dilemma.
| A．settled | B．settling | C．to settle | D．being settling |
I still remember_____ to visit the Mountain Tai when I was young and I am longing to visit it again.
| A．to take | B．to be taken | C．taking | D．being taken |