ESL-EFL Test - 21

Quizzes, tests, exercises and puzzles for English as a Second Language (ESL), English as a foreign language (EFL), Teaching EFL (TEFL), Test of EFL (TOEFL), English for speakers of other languages (ESOL), Teaching ESOL (TESOL), TOEIC.


1. I remember _________ the letter yesterday.


2. I signed ________ for the newsletter.


3. I signed ________ when I entered the building.


4. I signed the letter ________ my boss as she was out.


5. I thought it was going to rain, but it turned ________ to be a lovely day.



6. I think that ________ time I spoke to them was when I was in Lisbon.


7. I sorry but I ________


8. I saw Jon last week; ________ the way have you heard that he's getting married?


9. I stopped at the garage _________ some petrol.


10. I saw her ________


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Simple Science

How Pure Metal is obtained from Ore

Some Uses of Electricity:
When ore is mined, it contains in addition to the desired metal many other substances. In order to separate out the desired metal, the ore is placed in some suitable acid bath, and is connected with the positive terminal of a battery, thus taking the place of the silver slab in the last Section. When current flows, any pure metal which is present is dissolved out of the ore and is deposited on a convenient negative electrode, while the impurities remain in the ore or drop as sediment to the bottom of the vessel. Metals separated from the ore by electricity are called electrolytic metals and are the purest obtainable.

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