Evidence of a powerful volcano, which erupted under the ice sheet of West Antarctica around 325BC and might still be active now, __________ so far by British scientists.
| A．confirmed | B．has confirmed |
| C．is confirmed | D．has been confirmed |
—How is the debate of your essay?
—It ____ well, but I ____one of the key points.
| A．might work; hadn’t forgot | B．needn’t have worked; forgot |
| C．could have worked; forgot | D．would work; hadn’t forgot |
The nationwide smog serves as a constant reminder, indicating that it’s high time we ______ on ourselves.
| A．would reflect | B．have reflected |
| C．are reflecting | D．reflected |
---We've spent too much money recently.
---Well，it isn't surprising. Our friends and relatives ______ around all the time.
| A．are coming | B．had come | C．were coming | D．have been coming |
---- Did you know any German before you got to Berlin?
---- Not a single word _________.
| A．have I learned | B．had I learned |
| C．I’ve learned | D．I had learned |
It won’t be too long before we_____a way to smooth away these difficulties.
| A．work out | B．willworkout |
| C．had worked out | D．are working out |
When I met him the other day，it was the first time we ______ each other since we graduated from school.
| A．saw | B．have seen |
| C．were seeing | D．had seen |
I ______ to go on a diet, but the dishes at the party were simply impossible to resist.
| A．had intended | B．am intending | C．intend | D．could intend |
---I didn’t expect that John would be absent from my last Sunday’s birthday party.
--- As far as I know, he ______ to see his parents in the countryside on Sundays.
| A．goes | B．went |
| C．has gone | D．had gone |
Police are now searching for a woman who is reported to since the flood hit the area last Friday.
| A．have been missing | B．have got lost |
| C．be missing | D．get lost |
Tom, our manager, ________ for American in two days and he has asked me to find out when the earliest plane ________ next Sunday.
| A．is leaving; takes off |
| B．will leave; is taking off |
| C．is to leave; is going to take off |
| D．leaves; will take off |
At the age of 14, Father had to leave school and start working. There would be no one to support the family _______ he not worked.
| A．did | B．has | C．had | D．was |
— Have you read the novel?
— Yes. I ________ it three times while I was in university.
| A．had read | B．read |
| C．have read | D．was reading |
Mr. Baker including some tourists ______ the Great Wall before, so they headed for the Forbidden City.
| A．has gone to | B．have gone to |
| C．has been to | D．have been to |
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