He was afraid that the branch might bend over and break, and he would be sent _____ to the ground.
There is no doubt at all ________she will call us when she gets there.
—Does the idea of working abroad ________ you?—Yes. But I have no chance.
What we all know is that new technology is being ________to almost every industrial process.
They will start their project,________at helping the poor children to be educated in the west of China.
Einstein’s Theory of Relativity is so ________that most of us can not understand it.