{01}When I worked as the general manager of the firm, I sometimes had _____ to visit London on business.
A.opportunity
B.possibility
C.occasion
D.chance
解析:occasion 作可数名词时,意为“时机”,作不可数名词时,意为“必要”,本题中occasion意为“必要”。从句语法结构上看,本句中用opportunity(难得的)机会,chance(偶然的)机会均可,但按逻辑意思,应用occasion. 本题选C。 {02}The Chinese are looking forward to the first _______to land on the moon after three Chinese astronauts’ successful trip to space.
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