Помогите срочнооо!!!!! нужно исправить предложения прохожу тему passive

1)The room being cleaned and aired now.
2)Two new engineers has just been introduced to the head of the department.
3)The engineer's calculations can be rely on.
4)The light has not turned off yet.
5) The devices have been installed and checked by the beginning of yesterday's test.
6)The battery is being recharge now.
7)This mountain has never climbed before.
8)Next week the students be asked to carry out the experiment.
9)Electric power is transfer at high voltage.
10 )This power plant is constructed in 1935.

1)The room is being cleaned and aired now.2)Two new engineers  have  just been introduced to the head of the department.3)The engineer's calculations can be relied  on.4)The light has not  been turned off yet. 5) The devices have been installed and checked by the beginning of yesterday's test.6)The battery is being recharged  now.7)This mountain has never been  climbed before.8)Next week the students will  be asked to carry out the experiment.9)Electric power is transferred  at high voltage.10 )This power plant is constructed in 1935.