That (those)

 

Указательное местоимение (that — ед ч., those — мн.ч.)	Слово-замени­тель ранее упо­мянутых сущест­вительных (that — ед.ч., those — мн.ч.)	Относительное местоимение, вводит опреде­лительное при­даточное пред­ложение	Союз — вводит дополнительное придаточное предложение 1 i
Look at that man. — Посмот­ри на того чело­века. Look at those people. — По­смотри на тех людей	The calorific power of coal is 2-4 times greater than that of wood. — Теплотворная способность угля в 2-4 раза боль­ше, чем дерева.	The letter that came in the morn­ing is from my husband. — Письмо, которое пришло утром, от моего мужа.	She says that she did not receive this letter. — Она сказала, что не получила этого письма.

1. It is known that the scientists have already done considerable
work in the field of automatized systems of planning and control of
underground operations. Their experience is very encouraging.

2. The calorific value of coal is 2-4 times greater than that of
wood.

S.The equipment that the postgraduates have used for carrying out their experiments is of the latest design.

4. It was clear that computers could perform the work that man
could not.

5. The geological conditions of Wales differ from those of Scot­
land.