He lives ______, but he never feels_________.

do you study English— I study English by reading aloud every morning.

How did it _________ that all theflowers died —I had forgotten to water them.

One hundred percent_______to your studies， though it can be lonely and no fun at all， will leave precious marks on your youth．

Having become famous, Wang Baoqiang often has people ______ him in the street and ______ for his autograph (签名).