例句： If you consider that she has only been studying English for six months, she speaks it very well.

例句： The switches close the contacts and complete the circuit.

例句： Germs may invade the organism.

例句： She decided to string along with the others as she had nothing else to do.

例句： She went to London on the spur of the moment.

例句： Do you subscribe to her pessimistic view of the state of the economy?

例句： He wanted to marry her, and she would have him.

例句： You are just digging your own grave if you go on smoking so heavily.

例句： A series of lucky accidents led the explorer to his discovery.

例句： The experience in army is helpful to him.