第4题:[单选题]The sea turtle's natural habitat has been considerably reduced. A.suddenly
B.generally
C.slightly
D.greatly 参考答案:D 题干意为“海龟的自然栖息地大大地减少了。”句中划线词意为“相当大的”。D项greatly意为大大地;例句:His writing has improved greatly in this semester.这学期他的写作有了很大进步。A项意为突然地;B项意为一般地;C 项意为轻微地;故选D项。