问题补充：
At a rough estimate ( 估计), this country is Great Britain.
A. three times as the size of
B. three times large than
C. three times as larger as
D. three times the size of
答案：
A. three times as the size of
B. three times large than
C. three times as larger as
(答案→)D. three times the size of
解析：考查倍数被动法。倍数表达有四种：1. “A+倍数+形容词或副词的比较级+than+B”， 2.“A+倍数+as+形容词或副词的原级+as+B”， 3. “A+倍数+the size/height/length/width， etc+of+B”， 4. “……times+what+从句”。句意：粗略估计，这个国家是英国的三倍大。故D正确。
