The world’s elderly population will exceed(超过) ____ of children by 2060, when each group ____ to account for about one fifth of the population.
—Do you have any idea what Hank does all day? —I know he speaks at least as much time watching TV as he __________.
Having much to do,________.
Learning foreign languages calls for your memory, time, patience and emotions. _______,it is not a simple thing.
Private cars are required to take turns off roads one out of five weekdays ____the traffic pressure.
To tell the you the truth, the accident and the damage ______ resulted in frightened me so much that I almost have given up driving ever since.