All the others seem to know each other and I began to feel ________.
| A．given away | B．left out | C．turned down | D．fallen behind |
Human be haviour is mostly a product of learning, ____ the behavior of animals depends mainly on instinct.
| A．whereas | B．so | C．unless | D．that |
_______ from the hill, the whole city of Nanjing looks more beautiful.
| A．As people see | B．Seeing | C．People see the city | D．Seen |
____ I saw her, I remembered to give Marie the money I owed her.
| A．While | B．Immediately | C．Suddenly | D．Momentarily |
―Who are those people walking along the street with banners?
―A group _______ itself the League for Global Environment Protection.
| A．calling | B．called | C．being called | D．is called |
_____ human beings live in great numbers, the waters are very likely to become contaminated.
| A．That | B．Where | C．Even if | D．Though |