____ a strong and fair climate agreement at the key UN summit in Copenhagen, 50,000 people in London wore blue and went to the streets．
| A．Call for | B．Calling for | C．To call for | D．Called for |
When the group discussion is nearing its end, make sure to ____it with important points.
| A．conclude | B．lead | C．avoid | D．hold |
Eye doctors recommend that a child’s first eye exam ____at the age of six months old.
| A．was | B．be | C．were | D．is |
______how others react to the book you have just read creates an added pleasure.
| A．Hearing | B．Hear | C．Having heard | D．To be hearing |
If we leave right away, ____we’ll arrive on time.
| A．hopefully | B．curiously | C．occasionally | D．gradually |
The children, ____ had played the whole day long, were worn out.
| A．all of what | B．all of which | C．all of them | D．all of whom |