сделать 1. The translucent properties of this ceramic (1)(first/discover) by NASA ceramic engineers.

2. They (2) (carry out) research to (3)(develop) tough new materials when they suddenly (4)(notice) that light (5)(pass) through one of the ceramics.

3. Now, however, the ceramic (6)(commonly utilise) by dental engineers for (7)(make) protective braces, or restraints, for children’s teeth.

1) a) were first discovered b) had been first discovered c) have been first discovered

2) a) carried out b) had carried out c) were carrying out

3) a) developing b) develop c) have developed

4) a) have noticed b) noticed c) were noticing

5) a) passed b) was passing c) had passed

6) a) commonly utilised b) was commonly utilised c) is commonly utilised

7) a) making b) being made c) make

думаю жить в большой семье лучше, чем в маленькой.

Большая семья крепче, чем маленькая.

У родителей в такой семье крепкий брак.

Семьи значительно реже распадаются.

В большой семье будет меньше внимания от родителей, потому что оно делится между детьми, но в маленькой семье внимания может не быть из - за занятости родителей.

В большой семье присутствует элемент конкуренции между детьми, поэтому дети стараются быть лучше.

В большой семье легче справляться с проблемами.

В случае возникновения проблем у одного из членов семьи, вся большая семья пойдет на .

В большой семье обычно меньше места в доме, чем в маленькой семье.

I think to live in a big family better, than in the small.

The big family is stronger, than small.

Parents in such family have a strong marriage.

Families break up much less often.

In a big family there will be less attention from parents because it shares between children, but in a small family of attention can not be from - for employment of parents.

At a big family there is a competition element between children therefore children try to be better.

In a big family it is easier to cope with problems.

In case of problems at one of the family members, all big family will go to the aid.

In a big family usually there is less than place in the house, than in a small family