When a teacher intends to present or explain a new language point，which of the following grouping methods is mostly recommended？

（ ）Is red a strong color or a peaceful color?

Off hire is when a vessel breaks down，strands，or has any damage that prevents the working of cargo or delays the sailing of the vessel．Under which of the following charter parties is off hire most likely to be mentioned?（）.

Project（71）is an uncertain event or condition that，if it occurs，has a positive or a negative effect on at least one project objective，such as time，cost，scope，or quality．

Project ______is an uncertain event or condition that，if it occurs，has a positive or a negative effect on at least one project objective，such as time，cost，scope，or quality．

● Project（71）is an uncertain event or condition that, if it occurs, has a positive or a negative effect on at least one project objective, such as time, cost, scope, or quality.（71）

 ______ twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.

Scientists say it may be five or six years _____ this medicine is tested on human beings.

（ ）estimating is a technique for estimating the duration or cost of an activity ou project using historical data from a similar activity or project.

A mark or place at which a vessel comes under obligatory entry，transit，or escort procedure is know as（）.

What is the most important when it comes to a good job: money, colleagues, boss or the working environment?

（）generally indicates that a gale or storm is approaching.