单选题 Many studies have proven that eating at fast-food restaurants ______ per week is associated with more weight gain in otherwise healthy young adults.
  • (A) twice more
  • (B) as twice
  • (C) twice more than
  • (D) more than twice


【正确答案】 D
【答案解析】[理由] 本句测试下列固定用法：
more than+倍数词(twice、three times、four times…) 不只若干倍
[例] I have been to Hawaii more than five times.
(我去过夏威夷超过5次。)
根据上述，(D)应为正选。