Нужно.заранее use the correct tense form. 1) my bicycle isn't here.somebody (take) it. 2) last night i (arrive) home at half past twelve. 3) david (think) of his plans again and again. 4) i remembered that i (give) simon my pen. 5) they (write) a letter by 5 o'clock. 6) he told me he often (think) of it.

1) my bicycle isn't here. somebody has taken it. 2) last night i arrived home at half past twelve. 3) david thinks of his plans again and again. 4) i remembered that i had given simon my pen. 5) they will have written a letter by 5 o'clock. 6) he told me he often thought of it.

Множество находящихся под   серьезной  угрозой существ - рыб, насекомых, птиц, млекопитающих - могут исчезнуть прежде, чем вы обзаведетесь детьми. причина в том, что человек убивает животных и уничтожает их среду обитания. не только животные находятся в опасности. угроза нависла также и над растениями. в мире более девяти квадратных километров лесов. это огромное количество деревьев и существ, живущих среди них. но они быстро исчезают. каждый день мы используем бумагу и картон - и то и другое производят из древесины. мы используем множество видов древесины для изготовления мебели и других нужд. 

Iwant to be a doctor i've always wanted to be a doctor like me granny. she works it is a hospital. i often go to her hospital to watch how my granny treats people. i went to this hospital for the first time when i was 8. i liked everything and understood that i wanted to become a doctor. i want to help people. i know that i need to learn and work a lot to be a good doctor. i am not afraid of hard work. soon i shall start to learn chemistry. now i learn maths and i am fond of it. i like learning english. i think english will be every important for my future profession. when i'm sixteen i'll ask my granny to let me work at the hospital as a nurse boy.