规则
Compare like with like: things with things, people with people. Use "than" for comparisons and the correct comparative (bigger, more) or superlative (biggest, most) form.
同类相比：物与物比，人与人比。比较用than，并使用正确的比较级（bigger、more）或最高级（biggest、most）。
✔ 正确： The population of Sydney is larger than that of Perth.
✘ 错误： The population of Sydney is larger than Perth.
→ 改正： Compare population with population: "than that of Perth".
技巧: Ask what exactly is being compared. Use "that of / those of" to keep the comparison logical.
练习：10题
Which choice completes the text so that it conforms to the conventions of Standard English?
由AUSLEX原创的讲解和题目，并非College Board官方资料。SAT是College Board的商标。