... refers to people. This is Jack. His sister is staying with us. This is Jack, whose sister is staying with us. 6.i FIRST CERTIFICATE LANGUAGE PRACTICE 2 Decide which answer (A, B, C or D) best ... Mary's hair still needs cutting. 55 FIRST CERTIFICATE LANGUAGE PRACTICE 5 Complete the second sentence so that it has a similar meaning to the first sentence, using the word given. Do ... clauses In a non-defining relative clause we cannot leave out the relative pronoun. FIRST CERTIFICATE LANGUAGE PRACTICE 60 4 Put each verb in brackets into a suitable verb form. A friend in...