cExams.net
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 was just wondering whether you ________ be able to help me.


2. The speech he ___ was really boring.


3. He explained ________ the problem.


4. How ________ times have I told you?


5. The examiner says we ________ leave when we've finished.



6. They ________ fun of her accent.


7. Post it _________ as soon as you can, please.


8. Yes, ________ us were angry about it.


9. She advised _________ not to go there.


10. It ________ be very expensive, but it's much better than the others.


English Test

1. ESL-EFL Test - 105
2. ESL-EFL Test - 106
3. ESL-EFL Test - 107
4. ESL-EFL Test - 108
5. ESL-EFL Test - 109
6. ESL-EFL Test - 110
7. ESL-EFL Test - 111
8. ESL-EFL Test - 112
9. ESL-EFL Test - 113
10. ESL-EFL Test - 114
11. ESL-EFL Test - 115
12. ESL-EFL Test - 116
13. ESL-EFL Test - 117
14. ESL-EFL Test - 118
15. ESL-EFL Test - 119
16. ESL-EFL Test - 120
17. ESL-EFL Test - 121
18. ESL-EFL Test - 122
19. ESL-EFL Test - 123
20. ESL-EFL Test - 124
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  • Simple Science

    The Selection of Dyes

    Dyeing:
    When silk and wool, cotton and linen, are tested in various dye solutions, it is found that the former have, in general, a great affinity for coloring matter and acquire a permanent color, but that cotton and linen, on the other hand, have little affinity for dyestuffs. The color acquired by vegetable fibers is, therefore, usually faint.

    There are, of course, many exceptions to the general statement that animal fibers dye readily and vegetable fibers poorly, because certain dyes fail utterly with woolen and silk material and yet are fairly satisfactory when applied to cotton and linen fabrics. Then, too, a dye which will color silk may not have any effect on wool in spite of the fact that wool, like silk, is an animal fiber; and certain dyestuffs to which cotton responds most beautifully are absolutely without effect on linen.

    The nature of the material to be dyed determines the coloring matter to be used; in dyeing establishments a careful examination is made of all textiles received for dyeing, and the particular dyestuffs are then applied which long experience has shown to be best suited to the material in question. Where "mixed goods," such as silk and wool, or cotton and wool, are concerned, the problem is a difficult one, and the countless varieties of gorgeously colored mixed materials give evidence of high perfection in the art of dyeing and weaving.

    Housewives who wish to do successful home dyeing should therefore not purchase dyes indiscriminately, but should select the kind best suited to the material, because the coloring principle which will remake a silk waist may utterly ruin a woolen skirt or a linen suit. Powders designed for special purposes may be purchased from druggists.


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