B选项:them指代a language?
try to do表示“尽力或努力做某事”,try doing表示“尝试做某事,试着做某事”。
例如:1) He tried to control his temper. 他尽量去控制自己的脾气。
2) He tried to stand up but failed. 他试图站起来但没有成功。
3) I’m going to try cooking a French meal this evening. 我今天晚上想试着做一顿法国餐。
A选项:’explained ‘and‘ because of ’赘余;not just because of ...but by the fact that...不平行;
C选项:also有问题;drugs that are becoming more expensive和doctors having also written many more prescriptions for higher-cost drugs均为名词短语,这两个名词短语的核心词分别是drugs和doctors。在逻辑上,原因应该是“药物变贵”和“医生开处方”这两件事,而不是药和医生这两个名词,因此本选项是错误的。
DE选项:which occurred是非限定性定语从句,就近修饰先行词prescription drugs,在逻辑上,能被解释的肯定是“一个现象”而不是一种药;also用法错误;不平行;
Starfish, with anywhere from five to eight arms, have a strong regenerative ability题干中表示starfish为复数名词;
A选项:if X (then) Y, if后接被动态,主句用主动态,则开头的it quickly...中的it应该为they指代starfish;
CE选项:by the animal overcompensating中的by是介词,身后只能添加名词短语
D选项:第二个they应该为it, 指代arm
absence of ...;但复数一致;