Virus Security Software is designed to detect, eliminate or quarantine computer viruses before they are able to harm a computer or server networked system.

_____ they are fit I see no reason why they shouldn’t go on playing for another four or five years.

Each year in the United States, many black teenagers（）of school, either because they cannot keep up or they have to work to support their family.

What they are（）about is which comes first: the chicken or the egg?

英语tooth→teeth采用的语法手段是（）。

英语“She teaches English”（她教英语）中的“他”表示的语法范畴有（）

Do you agree or disagree with the following statement? People are never satisfied with what they have; they always want something more or something different. Write a composition of about 400 words to state your view on the issue.

The goal, which they are unlikely to live to see , is tocure, prevent or manage all diseasesin the next 80or so years.

什么是语法范畴？英语中语法范畴有哪些？用哪些语法手段来表示？

教师的知识结构中，小学英语教师所拥有的英语学科知识属于()。

在汉语学习过程中学习语法，对进行英语语法学习的影响是（）

Doctors are often caught in a _____ because they have to decide whether they should tell their patients the truth or not.