Какой элемент возглавляет главную подгруппу 4-й группы периодической системы:

Выберите один ответ:
титан (№22)
углерод (№6)
кремний (№14)
селен (№34)

. Choose the correct variant

 1. Before you ____, don't forget to lock the door.

  -are leaving                  -will leave                -leave                     -shall leave

 2. Please do not speak to anyone before the police ____ .

  -come                       -are coming                 -’ll come, came

 3. His parents will be very glad if she____ the university.

  -enter                       -’ll enter                       - enters                    - entered

 4. When you ____ my brother, you ____ him.

  -'ll see;   - won't recognize;    - see won't recognize;    -saw, recognize;    -'ll see, don't recognize

 5. We won't discuss the matter until the headmaster ______ .

  -'ll arrive                - won’t arrive                - doesn’t arrive-         -arrives

Чи є корінь в слові Село ? Як що так то де?

IV. Supply some, any, no, where required

I.        ... pupils went to the river ... to the woods. 2. ... of my friends live in Moscow. 3. ... have
you ... English dictionaries? 4. Is there ... ink in the inkstand? Yes, there is ... 5. Bring ... chalk,
please. 6. There is ... chalk in the box. 7. Is there ... milk in the jug? Yes, there is....

V. Choose the correct variant

 1. Before you ____, don't forget to lock the door.

  -are leaving                  -will leave                -leave                     -shall leave

 2. Please do not speak to anyone before the police ____ .

  -come                       -are coming                 -’ll come, came

 3. His parents will be very glad if she____ the university.

  -enter                       -’ll enter                       - enters                    - entered

 4. When you ____ my brother, you ____ him.

  -'ll see;   - won't recognize;    - see won't recognize;    -saw, recognize;    -'ll see, don't recognize

 5. We won't discuss the matter until the headmaster ______ .

  -'ll arrive                - won’t arrive                - doesn’t arrive-         -arrives