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Answer (4)
*E. They were strolling downtown when they had heard the crash. *
Another possible answer is B. Though the weather had been rough, we made it home safely.
The sentences 'By the time I returned home three hours had passed' and 'Though the weather had been rough, we made it home safely' correctly use shifts in verb tense . The other sentences contain incorrect shifts in tense. ;
The sentences with acceptable shifts in verb tense are A, B, and D. These sentences maintain a logical timeline regarding the actions they describe. Sentences C and E present incorrect shifts that confuse the timeframe of actions.
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Jawaban:1. Proses Bessemer2. Proses Open Hearth (Siemens-Martin)3. Proses Basic Oxygen Furnace (BOF)4. Proses Electric Arc Furnace (EAF)5. Proses Konverter Lanjutan (LD/BOF modern)Penjelasan:BessemerBahan baku: Besi cair dari tanur tinggiOksigen ditiup melalui besi cair dalam konverter untuk menghilangkan karbon.Open HearthCampuran besi cair dan scrap dipanaskan di dapur terbuka dalam waktu lama.Digunakan api langsung, proses lambat tapi bisa kontrol komposisi lebih baik.BOF (Basic Oxygen Furnace)Oksigen murni ditiup ke besi cair dengan tekanan tinggi.Proses cepat dan efisien, banyak dipakai di industri modern.EAF (Electric Arc Furnace)Bahan baku utama: besi tua (scrap).Menggunakan busur listrik untuk melelehkan logam, efisien untuk daur ulang.Konverter Lanjutan (LD)Versi modern dari BOF dengan pengendalian suhu dan kandungan kimia lebih presisi.
