No one really knows exactly when the first people arrived in we now know as California.
| A．that | B．which | C．what | D．where |
—Don't use my handkerchief to wipe the table，gentleman.
—Oh, I' m very sorry.I________clearly.
| A．didn't see | B．hadn't seen |
| C．wasn't seeing | D．can't see |
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 |