Why these things happened was ____ the driver had been careless.
| A．because of | B．owing to | C．due to | D．that |
Only when the European countries' financial system broke down _____to take measures to deal with those problems．
| A．did they decide | B．they decided | C．they had decided | D．had they decided |
He, an average citizen, always thinks of_____ he can do more for the people．
| A．how | B．why | C．what | D．which |
Children under sixteen are not permitted to participate in such kind of activities _____ bad for their mental development.
| A．as is | B．as are | C．that are | D．that they are |
I always _____ on life when listening to Beethoven’s symphony.
| A．react | B．recover | C．reflect | D．respond |
—I’m fed up with this rain. How I wish to go hiking this weekend!
—Forget it. I’m afraid the wet days will _____.
| A．hold up | B．keep up | C．take up | D．turn up |