【单选题】
Our modern civilization must not be thought of as ______ in a short period of time.
【单选题】
By the time she is 50 years old, she _____ an inmate of the prison for over half of her life.
【单选题】
He has been writing the essay the whole morning and he still ___ .
【单选题】
Greater efforts to increase agricultural production must be made if food shortage ______ avoided.
【单选题】
There was a knock at the door. It was the second time someone _____ me that evening.
【单选题】
He didn’t show up at the party yesterday. He ____ in the lab.
①
must have been busy working
④
would have been busy working
【单选题】
Marlin is an independent man who is not about _____ on his parents any more.
【单选题】
It _____ for over a month and the downpour had damaged many houses.
①
has rained cats and dogs
②
has been raining heavily
④
had been raining cats and dogs
【单选题】
Between 1897 and 1919, at least 29 motion pictures _____ .
【单选题】
At the age of twenty-three, Emily ______ a businessman of her own choice.