4.在下列每組單中,有一個單詞的加粗部分與其他單詞的加粗部分的讀音不同，找出這個詞。

• A、use

• B、excuse

• C、button

• D、music

46.How much of the land surface on Earth is covered by rainforests?

• A、More than 50%.
• B、Nearly 12%.
• C、Less than 5.3%.
• D、Around 22.5%.

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