What mainly accounts for the possibility that distance learning could become the norm?

④Night __ (surround) the earth,nobody-|||-could make out what the dark mass was

There is a possibility that man will mainly depend on_energy in the future.A. so

[单选题]Smart devices have become the master mainly because __________.A.everybody

[试题]B．yalmostanymeasure,thereisaboominInternet-basedinstruction.Injustafewyears,34percentofAmericanuniversitieshavebegunofferingsomeformofdistancelearning(DL),andamongthelargerschools,it’scloserto90percent.Ifyoudoubtthepopularityofthetrend,youprobablyhave

[单选题]What is the text mainly about?A． The research into war history.B． The finding of a forgotten hero.C． The pilots of the two world wars.D．The importance of military studies.

[单选题]What is the text mainly about?A． Fish dieting and human dieting.B． Dieting and health.C． Human dieting.D． Fish dieting.

[单选题]What is the passage mainly about?A． The changes of the author’s attitude to her mother’s English.B． The limitation of the author’s perception of her mother.C． The author’s misunderstanding of “limited” English.D． The author’s experiences of using bro

[单选题]What is the passage mainly about?（ ）A． The changes of the author’s attitude to her mother’s English.B． The limitation of the author’s perception of her mother.C． The author’s misunderstanding of “limited” English.D． The author’s experiences of using

[单选题]What is the conversation mainly about?A． The woman’s study.B． The woman’s friend.C． The woman’s trouble.

[单选题]What is the conversation mainly about?A． Buying some booksB． Repairing a watchC． Finding a place