[ Grammar ]
________ his terrible back pain, my grandfather had no choice but to cancel his trip to Fujian.
A. Due to
B. Because
C. Instead
D. Since

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Grammar › ViewMy parents _____ have a holiday this year. They are both busy at work.
A. don’t go to
B. aren’t going to
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Factories allow these dangerous substances to pour into the rivers, ___ their chimneys fill the atmosphere with poisonous fumes.
A. while
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A. We
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After thirty-five years of doing a great job at the company, Bob _____.
A. hired
B. retired