Find out which part of the sentence has an error:
They didn′ta work hardb to get good marksc Didn′t they?d
They didn't work hard to get good marks. Did they?
The studentsa only drewb on one sidec of the paperd
The farmersa will have reapedb their crops beforec the rainy season sets ond
Ramesh has been working in this firma for 10 yearsb but no one hasc recognise his potentiald
The teacher tolda the students thatb the earth movedc around the sund