Combine the sentences using relative clauses. (cẩn thận những câu là "Non-defining relative clauses" thì nhớ phải thêm dấu phẩy):
LƯU Ý: NHÌN KỸ ĐỀ RỒI MỚI TRẢ LỜI! TUYỆT ĐỐI KHÔNG COPY MẠNG VÌ CÂU HỎI CỦA MÌNH CÓ THỂ HƠI KHÁC!
4. Parents are being asked to take part in the survey. Their children are between four and six.
-> .............................
6. I was introduced to a man. I had seen his brother on television the evening before.
-> ....................................
Parents whose children are between four and six are being asked to take part in the survey.
I was introduced to a man whose brother I had seen on television the evening before.