21.While the owner of a condominium apartment has free and clear title to the dwelling, owners of cooperative apartments have shares in a corporation that owns a building and leases apartments to them. (A) While the owner of a condominium apartment has free and clear title to the dwelling, (B) The owner of a condominium apartment has free and clear title to the dwelling, but (C) Whereas owners of condominium apartments have free and clear title to their dwellings, (D) An owner of a condominium apartment has free and clear title to the dwelling, whereas (E) Condominium apartment owners have a title to their dwelling that is free and clear, while 答案是C。但D错在哪里？
22.Although films about the American West depict coyotes as solitary animals howling mournfully on the tops of distant hills, in reality these gregarious creatures live in stable groups that occupy the same territory for long periods. (A) films about the American West depict coyotes as solitary animals howling mournfully on the tops of distant hills (B) in films about the American West coyotes are depicted to be solitary animals that howl mournfully on the tops of distant hills (C) coyotes are depicted as solitary animals howling mournfully on the tops of distant hills in films about the American West (D) films about the American West depict coyotes as if they were solitary, mournfully howling animals on the tops of distant hills (E) films about the American West depict coyotes to be solitary and mournfully howling animals on the tops of distant hills 答案是A。但C错在哪里？
25.Few people realize that the chance of accidental injury or death may be as great or greater in the “safety” of their own homes than in a plane or on the road. (A) may be as great or greater in the “safety” of their own homes than (B) is at least as great or greater in the “safety” of their own homes than (C) might be so great or greater in the “safety” of their own home as (D) may be at least as great in the “safety” of their own homes as (E) can be at least so great in the “safety” of their own home as 答案是D。但E错在哪里？
21题D错在与后面在人称的单复数上不一致，whereas和while引导的从句与主句之间最好能做到完全相对应。而且如果按照D的说法，句子的重心就改变了。 22题我也错了，想来可能是因为“on the tops of distant hills in films about the American West”容易引起歧义 25题用“as...as...”比较好吧
