规则
Items in a list or comparison should use the same grammatical form.
列举或比较的各项应使用相同的语法形式。
✔ 正确： The volunteers planted trees, cleaned the river and painted the fence.
✘ 错误： The volunteers planted trees, cleaned the river and were painting the fence.
→ 改正： Use the same past-tense form: "painted".
技巧: Line the items up: they should all be -ing words, all "to" verbs, or all the same tense.
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。