6. _____ I suggest, he always disagrees.
| A．however | B．whatever | C．Whichever | D．Whoever |
From the dates________on the gold coin，it is confirmed that it was made five hundred years ago.
| A．marking | B．to be marked |
| C．marked | D．having been marked |
Linda worked for the Minnesota Manufacturing and Mining company，________as 3M.
| A．knowing | B．known | C．being known | D．to be known |
—We all had a lot of fun at the barbecue yesterday. Pity you weren't there.
—I really should have gone with you but I________on some remaining problems.
| A．worked | B．was working |
| C．would work | D．would have worked |
—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 |