The letter (send)___yesterday the Bolshoi Theatre (build)___in1776 this picture (paint)____by a well-know artist in 1890 Moscow (found)___in 1147 Yuri Gagarin (send)__to space on the 12th of April, 1961

Это все страдательный залог, т.е. was/were + глагол во II форме (т.к. здесь Past Simple везде).1) was sent2) was built3) was painted4) was founded5) was sent

The letter was sent yesterday. The Bolshoi Theatre was built in1776. This picture was painted by a well-know artist in 1890. Moscow was founded in 1147. Yuri Gagarin was sent to space on the 12th of April, 1961.