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Assignment I Choose the one underlined word or phrase that must be changed for the sentence to be correct (questions 1-6). Choose the right answer of the questions (questions 7-10). 1. Gunpowder, in some ways the most effective of all the explosive materials, were a mixture of potassium nitrate, charcoal, and sulfur. 2. As the demand increases, manufacturers who previously produced only a large, luxury car is compelled to make a smaller model in order to compete in the market. 3. There are twenty species of wild roses in North America, all of which have prickly stems, pinnate leaves, and large flowers, which usually smell sweetly. 4. Factoring is the process of finding two or more expressions whose product is equal as the given expression. 5. Schizophrenia, a behavioral disorder typified by a fundamental break with reality, may be triggered by genetic predisposition, stressful, drugs, or infections. 6. If Grandma Moses having been able to continue farming, she may never have begun to paint. 7. Sedimentary rocks are formed below the surface of the Earth___ very high temperatures and pressures. A. where there are B. there are C. where are there D. there are where 8. A computer is usually chosen because of its simplicity of operation and ease of maintenance ___ its capacity to store information. A. the same as B. the same C. as well as D. as well 9. Professional people expect___ when it is necessary to cancel an appointment. A. you to call them B. that you would call them C. your calling them D. that you are calling them 10. In a new culture, many embarrassing situations occur ___a misunderstanding. A. for B. of C. because of D. because