Nearly a century later，extensive observations_______that elephants indeed remember injuries and hold hates against their abusers．
| A．confirmed | B．have confirmed |
| C．will confirm | D．had confirmed |
There being no witness on the spot, the police were delayed by the ________of information about the crime.
| A．analysis | B．disappearance | C．absence | D．consideration |
What British singer-songwriter Adele worried was ___________ the audience would accept her remained to be seen.
| A．how that | B．which if | C．that whether | D．what that |
He _____in London for many years, but he has never regretted his final decision to move back to China.
| A．lived | B．was living | C．have lived | D．had lived |
I don't think she could have done such a stupid thing yesterday, _____?
| A．do I | B．could she | C．did she | D．has she |
---- How do you find his work?---- _____________.
| A．I find it by accident | B．Well done | C．Sorry, it’s out of order | D．No wonder, here it is |