Решите два ,90 2. fill in the blanks with the proper forms of the in nitive. 1. we didn’t believe you it. a. to do c. do b. to be done d. to have been done 2. the teacher wishes them part in the conference. a. to have been taken c. to be taken b. to take d. take 3. he allowed these data in the article. a. to use b. use c. to be used d. be used 4. he didn’t expect them here. a. to study c. to have been studied b. to be studied d. study 5. the teacher made the students the metal properties. a. to study c. to have been studied b. to be studied d. study 6. the teacher let the students the experiment. a. to change c. to be changed b. change d. to have been changed 7. the teacher supposed the the text about engineering ma- terials. a. to be read c. to have been read b. read d. to have read 8. he ordered the experiment by them. a. to be made c. to have made b. make d. to make 9. we expect them this problem long ago. a. to have investigated c. to be investigated b. investigate d. to investigate 10. he believes the manufacturers the technological process. a. to have been changed c. change b. to change d. to be changed 3. the text contains di erent mistakes: 2 — in spelling, 5 — in grammar. cor- rect the mistakes and rewrite the text. there are various clases of materials. they can be divide into two groups: metals and non-metals. metals includes ferrous and non-ferrous metals. cast iron and steel is common ferrous metals. copper and aluminium is non-fer- rous metals. non-metals embraces polimers, ceramics, etc.

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