There are certain ________ when you must interrupt people who are in the middel of doing somethinga conditions b situations c occasions 求权威老师 帮我分析分析

There are certain __ when you must interrupt people who are in the middle of doing something. A) conditionsB) situationsC) occasionsD) environments请问应该选什么?以及为什么? there are (two) pencils on the desk.__ __ __ __ __ on the desk? People are certain that they will win the game.(改为同义句) __ __ that they will win the game. 翻译 there are plenty of things about city life in the future which are not certain. There are quite a few books on the shelf There are __ __ on the shelf 一个单词 certain(adj.)的(adv.)形式当然,无疑以及他的同义词确定,肯定 几个填空一个单词certain(adj.)的(adv.)形式当然,无疑以及他的同义词确定,肯定几个填空只剩下大约1,600只There are only about 1600__ Where′ there‘ is love,there are always wishes.__ ..请说明理由...15.There are certain __ when you must interrupt people who are in the middle of doing something.A.conditions B.situations C.occasions D.environment 16.Lightning is a __ of electrical current from a cloud to the ground or one cloud are you absolutely certain? we are quiet certain that we will get there in time 为什么是表语从句 there are certain things we need to consider 怎么划分句子成分 It's cloudy today.同义句There is __ __ today.There are ___ ___ today. there are plenty of things about city life in the future which are not certain.句子成分分析 1.There are certain ____ when you must interrupt people who are in the middle of doing sth. There are usually certain elements in the procedures that are similar.中that引导的是什么从句?怎么翻译? there are many __ in our __lab.(chemical) There are two __(hundred) students in our factory There are many kinds of __(active) in our school