Turn the following sentences into active
1, This excercies were done well
2, This dress must be washed in cold water
3, No mistakes have been made in his composition
4, His painting will be exhibited for the first time by New Arts Gallery
5, This house was built 100 years ago
6, These artifical flowers are made of silk
7, The lesson are being written by the student now
8, This job has to be done at once
9, These animals at the zoo are fed twice a day
10, The operation is going to be performed by French doctors
1, these exercises were done well
=>they did these exercises very well
2, this dress must be washed in cold water
=>they must wash this dress in cold water
3, No mistakes have been made in his composition
=>he haven't made any mistake in his composition
4, His painting will be exhibited for the first time by New Arts gallery
=>New Arts gallery will exhibit his painting for the first time.
5, This house was built 100 years ago
=>they built this hou e 100 years ago
6, These artificial flowers are made of silk
=>they make these artificial flowers of silk
7, The lesson are being written by the student now
=>the students are writing the lesson now
8,This job has to be done at once
=>they have to do this job at once
9,These animal at the zoo are fed twice a day
=>they feed these animal at the zoo twice a day
10, The operation is going to be performed by French doctors
=>French doctors are going to perform the operation
