_______ his son away to college, the old couple got more room in the house.
| A．As | B．For | C．Through | D．With |
Only by working hard can you ______ the goal.
| A．achieve | B．receive | C．make | D．take |
. —Did you have ________ fun at the party?
—Yes. It’s ________ shame that you missed it.
| A．a; a | B．/; / | C．/; a | D．a; / |
It was in the lab ______ was taken charge of by Pro. Harris ______ they did the experiment.
| A．which; where | B．that; which | C．whom; that | D．which; that |
The public ______ of the environmental problem will make the government take it seriously.
| A．existence | B．revolution | C．awareness | D．evidence |
--Can you tell me ______ I can do with the broken computer?
-- Sorry, you’d better ask an expert ______ to deal with it.
| A．how ; what | B．what ; how | C．how ; how | D．what ; what |