Fiind the errors and correct them.

There is a big machinery at the factory.
He lay the blanket over the sleeping child.
The boy ,that is my friend ,is studying science.
The weather forecast predicted heavy rain ,thus we decided to postpone our outdoor event.
The dog ran after him which made him scared a lot.
The questions were very difficult which caused her failure.
She's a good student. Yet her grades dropped this semester.
She had the qualifications ,therefore got the job.
She missed the bus ,as a result, she was late for school.
The car had a flat tire, consequently, we had to call for help.

 

answers

machinery ,uncountable

lay laid laid
,that
,thus
,which
,which
,yet
. Therefore
.As a result
.Consequently