I've visited a lot of different places and stayed in lots of different hotels, but none of them ________ this one.

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—You don't seem to be quite yourself today. What's wrong?

—Oh, I'm suffering from a cold. Nothing serious, ________.

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________ you understand the rule, you will have no further difficulty doing it.

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The research is so designed that once ________ nothing can be done to stop it.

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—What happened to him this morning?

—Oh, he was seen ________ down and the driver ________ away.

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In front of ________ remained of the house after the earthquake, the old couple didn't know what to do.

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A lot of work remains ________ in the office, but we've got to attend a meeting pretty soon.

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In the morning the employees found the office broken into and they ________ the police immediately.

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________ made us surprised that the students even didn't know ________ the difference between the two words lies.

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He took pity on the people in the flooded areas and ________ his clothes and bedclothes to them.

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