.Вычислите объем водорода(н.у.) который присоединяет этен массой 28г а)44,8л б)22,4л в)11,2л г)5.6л

помогите пожалуйста.... Как правильно употребить глагол в скобках в  (Passive Voice)

She fell into the water because she (push).  We (suppose) to take your remark seriously?  They say she (interview) for the job tomorrow.  The newspaper (deliver) before I got up this morning.  Milk can (buy) at the shop on the corner.  We (tell) there (be) a private bathroom for every room.  Next week we (tell) who will be in charge of the depart­ment.  I phoned the police when I found out that my passport (steed).  A new plug for the television must (buy).   Smoking (not/allow) in this part of the building.   I (tell) that fifty people (invite) to the reception. The National Gallery (restore) at the moment. During the Gulf War many oil wells in Kuwait(damage). He (arrest) by a security guide, who later admitted he had made a mistake. When I entered the room Richard still (examine).  I wonder who else is going (to invite).  Oranges usually (treat) with wax and then (store) in large boxes.  We can't take the car yet: it still (repair).  The windows are really dirty: they (not/clean) for years.  Do you need (wake) up in the morning?  The local cinema (close down) three years ago. Very few typewriters (sell) these days.  It (estimate) that after it (open) The Millenium Bridge (use) by four million people to cross the Thames each year. Simon says he regrets giving up studying French at school, as now he ( offer) a gob a France. Sarah felt unhappy that she (not/pick)  for the basketball team. Trafalgar square looks much better  now that some of the buildings (clean). The cat nearly (run) over  but luckily the driverstopped just in time. Suzy recently (choose) to represent herschool at the national youth festival. The principle of free medicalcare for everyone ( establish) in Britain in 1948.  Chris informed that he (select) to go on an expedition through the jungle. When the film came out it (praise) highly by critics. Nowadays ordinarry letters (replace) gradually by email. Although the puppy (sweep) out to sea by the huge waves he managed to  swim back. The police suspected thet the jewels (hide) in the van. I recently (ask) to give a talk about how to prepere students for examinations. Customers (request) to  leave their bags at he desk when trying on footwear. Her brother is in hospital now. He (treat) for a stomach ulcer. I just (tell) you wished to see me. 

Мальчик ехал на велосипеде со скоростью 24 км/ч , а затем шел со скоростью 4 км/ч , какую часть всего пути и какую часть всего времени движения мальчик ехал, если за 2 часа он преодолел 16 км?

От одной пристани отплыл в 11 часов ночи пароход, проходивший по 15 км/час, а от другой пристани навстречу ему в 3 часа следующего утра вышел другой пароход, проходивший по 17 км/час. Через сколько часов после отплытия второго парохода они встретятся, если между пристанями 380 км?