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1. In mathematics, a variable is a symbol …………….. some element of a set. A. and representing B. represents C. that represents D. represents that

1. Modern industrial methods have supplanted individual crafts, ………………. stone carvers, coopers, and cobblers virtually extinct. A. make blacksmiths, B. made blacksmiths, C. making them blacksmiths, D. making blacksmiths,

1. No one has been able to satisfactorily explain how or …………… the Moon sporadically sparks. A. when B. why C. what D. which

1. The mausoleum is …………….. by Thien Thu mountain, two towering columns and a vast expanse of water. A. feed B. feeding C. fed D. feeds

1. Can you see the woman ________ the right? (A) of (B) off (C) on (D) over

1. He doesn’t work now. He’s ________ 65. (A) at (B) in (C) over (D) for

1. I’m sorry I ________ your party: I was away at the time. (A) lost (B) failed (C) passed (D) missed