It is pretty well understood_______controls the flow of carbon dioxide in and out of the atmosphere today．
| A．that | B．when | C．what | D．which |
-- It’s a pity that you missed the lecture on nuclear pollution.
-- I _________ it, but I was busy preparing for a job interview.
| A．attended | B．had attended | C．would attend | D．would have attended[ |
This is the small house less than 15 square meters, under _________ roof lives a large family of three generations.
| A．which | B．that | C．its | D．whose |
Fill your inside world with peace, love and joy _________ what happens in the outside world.
| A．because of | B．in addition to | C．regardless of | D．according to |
I was late for school this morning because the traffic was _________ by an accident.
| A．used up | B．given up | C．held up | D．put up |
-I’ll come to see you this afternoon. Shall I bring something to read?
--OK, _________.
| A．you are welcome | B．by no means |
| C．take your time | D．so much the better |