— Has Jack finished his homework yet?
— I have no idea；he ＿＿it this morning.
| A．was doing | B．had been doing | C．has done | D．did |
The work is not very profitable __________ cash, but I am getting valuable experience from it.
| A．in case of | B．in face of | C．in terms of | D．in addition to |
________ that we can’t afford to waste it.
| A．So precious is time | B．So time is precious |
| C．So is time precious | D．So precious time is |
It is generally accepted that Chinese were the earliest ________ football while the European established the modern rules for football.
| A．played | B．playing | C．to play | D．having played |
While we were listening to the speech attentively, a voice ________ to announce the result of the election
| A．broke in | B．broke down | C．broke up | D．broke off |
Wang Meng's winning women's 500m short track at the Vancouver 2010 Olympics was an exciting moment, ________ all Chinese will never forget.
| A．that | B．it | C．one | D．the one |