An underwater hotel has opened in Africa，with its rooms＿on the bottom of a three－level floating building．
| A．to sit | B．sit | C．sitting | D．sat |
This business company which was ________ in 1724 has developed into a big one.
| A．found | B．to find | C．founded | D．being founded |
The most important ________ of his speech was that we should all work wholeheartedly for the people.
| A．element | B．spot | C．sense | D．point |
________ his being late again，he lost his job and had to stay at home.
| A．Owe to | B．As result of | C．In case of | D．Because of |
I found all ________ in the play funny and interesting.
| A．directors | B．the director | C．characters | D．the characters |
I don't want to get ________ in some lengthy argument about who is to blame.
| A．included | B．involved | C．concerned | D．affected |