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13. The pilot asked ail the passengers ______ board to remain seated as the plane was making a landing.

12. Poisonous things mustn't be put _______  children's reach so that they can't cause unexpected troubles.

11. The professor has ______ 11-year-old boy who has________  gift for dancing.

10. The success of a government should ________ ( measure) by the happiness of the people as well as the de-
velopment of economy.

9. It________ (be) Sunday, rather than stay at home, I preferred to travel.

8. It is often cloudy or ______ (mist) and it rains now and again, so people don't get much sunshine in the year.

7. After the rain, we felt ________ (slight) cooler tonight.

6. The evidence _________ (confirm) that this product is safe and effective.

5.    Nowadays more and more ___________ (tradition) businessmen feel worried that growing e-commerce will de-
crease their share of the market.

4. Students brave enough _________ (take) this adventure course will certainly learn a lot of useful skills.