1 . Directions: Complete the following sentences by using the words in the box. Each word can be used only once. Note that verbs should be used in proper tenses and voices.

automatically        proof          secure          surround          operation ultimately            fancy            reliable        power             equivalent

1. Brennon’s health condition continued to worsen, and ________ , he had no brain activity.
2. It is said that the squirrel bridge was built from metal and it was water-________ so that it can stand longer.
3. Expert surgeons have been called in to deal with such a challenging ________ on the man injured in the accident.
4. Sex education ________ by ongoing debate in Canada, where curricular content varies from province to province.
5. Here are new card games popular in the Western geek circle that offer much brain work. Give them a try if you ________ testing your limits.
6. I tried ordering a cup of milk tea that day, and my beverage came in an instant — everything was done ________ in the delivery process.
7. Are your information data safe and ________? In an ideal world such data as a scientific study is based on should be at least available to other researchers.
8. To keep transactions(交易)________, Apple uses a method known as “tokenization” to prevent actual credit card numbers from being sent over the air.
9. The motorcar will undoubtedly change a lot over the next 30 years. It should become smaller, safer and more economical — eventually not gas-________.
10. IBM is spending $50 million over five years on “dependent-care” facilities for its employees. Although that sounds generous, it is the ________ of little more than $30 for each IBM employee every year.