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Teach children ______ electrical appliances, cords, and switches are not toys.

With the nuclear crisis worsening in Iran, the world's attention is fixed again on  is called the Middle East．

Don't throw away the old books. Give them to ________ needs them．

The road is covered with snow. I can’t understand ______ they insist on going by motorbike.

Do you know ____Rome wasn’t built in a day means?

Scientists observe ___ making the most of our senses when we are young can keep us healthy later on in life.

The old lady’s hand shook frequently. She explained to her doctor _______this shaking had began half a year before, and ______, only because of this, she had to give up her job.

It is none of my business. It's up to you to decide     he bought yesterday is used for.

A Hope School will be built in_____ used to be a temple.

He  told ______ should  read.