1) Mark (water) the flowers at the moment. 2) Jill (brush) her teeth every day. 3) I (think) about moving to the country. 4) I can't find my keys, I think I (lose) them. 5) He (buy) a new car recently. 6) Bob and Tim (repair) their room since Friday. 7) You (work) all day long. You should rest. 8) The train (leave) at 6. 9) It (get) hotter and hotter. 10) I (know) Jane for 5 years.

За исключением нескольких описок, все правильно.1) it all started in 1865. a group of frenchmen were having dinner in one of the most fashionable restaurants near paris.2) they talked about the democratic changes in the usa and wanted to support the american people. after a short discussion they agreed on an original idea. 3)the idea was suggested by frédéric-auguste bartholdi, a sculptor and designer. he said they could make a statue of a woman holding the torch of freedom. 4) it was an ambitious project and it was impossible to complete it quickly. 5) it actually took 21 years for this idea to become a reality. the french people raised money to build the statue, and, finally, in 1886 it was ready.6) on july 4, 1886 the united states received their amazing gift - the statue of liberty!

длительное время. Как следует из названия, оно отвечает за события, которые происходили в и продолжались какое-то время.
I was playing.
He was eating
They were laughing
Were you sleeping when I called? You sounded drowsy.
Ты спал, когда я позвонил? Ты казался сонным.
 was sleeping when someone knocked at the door
In the morning our elevator was not (wasn’t) working.
Утром не работал лифт.
I/He/She/It + was + глагол-ingWe/You/They + were + глагол-ingI was singing. – Я пел.He was walking. – Он гулял.She was writing. – Она писала.It was falling. – Оно падало.WWas I singing? – Я пел?

Was he walking? – Он гулял?

Was she writing? – Она писала?

Was it falling? – Оно падало?e were reading. – Мы читали.
You were talking. – Вы разговаривали.
They were running. – Они бежали.I/He/She/It + was not + глагол-ingWe/You/They + were not + глагол-ingI was not singing. – Я не пел.He was not walking. – Он не гулял.She was not writing. – Она не писала.

It was not falling. – Оно не падало.We were not reading. – Мы не читали.You were not talking. – Вы не разговаривали.They were not running. – Они не бежали.At midnight I was reading a book. – В полночь я читал книгу. (я начал читать до полуночи, возможно, продолжал после и в это конкретное время находился в процессе чтения)