The first mobile phones were heavy and ________ to use, but nowadays they are much easier to handle. ( 章节：1 难度：3)
- A、immense
- B、clumsy
- C、substantial
- D、advisable
正确答案:B
答案解析:有
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The first mobile phones were heavy and ________ to use, but nowadays they are much easier to handle. ( 章节：1 难度：3)
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