1Suppose you have to cancel your travel plan and will not be able to visit Professor Smith.
主干主语：you（祈使句隐含听话人）；谓语：have to cancel / will not be able to visit；宾语：your travel plan / Professor Smith
结构祈使句以Suppose引导假设情景，后接宾语从句you have to…。从句内and连接两个并列谓语：have to cancel your travel plan与will not be able to visit Professor Smith，后者含be able to结构。整体为写作指令中的情景设定，并非阅读长难句中的多层嵌套。
译文假设你不得不取消旅行计划，因而无法拜访史密斯教授。
考点Suppose引导情景假设，考研小作文常考 · be able to与will not连用表示将来能力的否定
2Write him an email to 1) apologize and explain the situation, and 2) suggest a future meeting.
主干主语：（省略you）；谓语：Write；间接宾语：him；直接宾语：an email
结构祈使句。to后不定式表目的，1)与2)为并列目的内容：apologize and explain the situation与suggest a future meeting，and连接两项写作任务。数字编号是提纲式指令，结构简单，考点在任务覆盖而非从句层次。
译文给他写一封邮件：1）道歉并说明情况；2）建议改日再见面。
考点小作文必须覆盖提纲两点，缺一不可 · write sb. an email后接to do表写信目的
3You should write about 100 words on the ANSWER SHEET.
主干主语：You；谓语：should write；宾语：about 100 words
结构情态动词should表要求。about 100 words作宾语，on the ANSWER SHEET为地点状语。无从句、无倒装、无插入，属格式要求句，难度低。
译文请在答题卡上写大约100词。
考点about 100 words为字数弹性要求 · on the ANSWER SHEET是卷面格式硬性规定