Bats are surprisingly long-lived creatures, some _______ a life span of around 20 years.
A. had B. having C. have D. to have
According to the information from the airline, a small sinking part of the runway of the airport is _______ for the accident.
A. to blame B. to be blamed C. to blaming D. to be blaming
Obviously the measures taken by the local government have_______ the solution to drinking water problems in this region.
A. contributed to B. referred to C. turned to D. devoted to
--Do you know when the Chinese custom_________ from?
--It's hard to say. But its characteristics__________ the Tang Period.
A. began; prove B. started; show C. dates; suggest D. is; appear
Paper bags produced every year are ______ the world’s production of vehicles.
A. as three times heavy as B. three times weight of
C. three times the weight of D. three times as heavier as
His spare time is made full use_______ law.
A. to study B. study C. of studying D. of to study
