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_ for you to take an umbrella. A. difficult B. interesting C. careful D. necessary ( )5. I think Fred is better_____ swimming than me. A. in B. at C. for D. with D 單元基礎(chǔ)鞏固 B ( )6. Tu Youyou is one of _____ in China. A. a famous scientist B. famous scientists C. the most famous scientist D. the most famous scientists D 單元基礎(chǔ)鞏固 ( )7. I _____ my pen everywhere but I couldn’t _____ it. A. found。 find C. looked for。 find B 單元基礎(chǔ)鞏固 ( )8. Cindy always does homework the _____ so she can get good grades in all the tests. A. careful B. c