--Have you had ________ breakfast yet? -- No, not yet.
| A．/ | B．a | C．the | D．an |
The school rule states that no child shall be，unless________by an adult，allowed out of the school during the day.
| A．was accompanied | B．accompanying |
| C．accompanied | D．being accompanied |
—How do you deal with the disagreement between the company
and the customers?
—The key________ the problem is to meet the demand____
____by the customers?
| A．to solving；making | B．to solving；made |
| C．to solve；making | D．to solve；made |
Prices of daily goods________through a computer can be lower than store prices.
| A．are bought | B．bought |
| C．been bought | D．buying |
The poor little boy________by his heartless parents was seen begging in the street.
| A．abandoning | B．to be abandoned |
| C．having abandoned | D．abandoned |
Throughout history，the language________by a powerful group spreads across a civilization.
| A．speaking | B．spoken | C．to speak | D．to be spoken |