The weather turned out to be fine yesterday. I the trouble to carry my umbrella with me.A should have taken B could have taken C needn’t have taken D mustn’t have taken
_______ any other species, human populations are shaped by the usual forces of natural selection, like famine, disease or climate.
— I’m terribly sorry to keep you waiting for so long. — _______.
It’s extremely dangerous for the drivers to _______ speed as the traffic lights are changing.
The government is now trying to provide _______ health benefits to all citizens in China.
With more than 17000 islands, _____ only 6000 are inhabited, Indonesia is the world’s largest archipelago (岛国).