一、语法填空(根据课文内容、依据语法规则完成下面短文）
Elias was a poor black worker. The time 1________ he first met Nelson Mandela was 2________ very difficult period of his life. Nelson Mandela offered 3________ (guide) to poor black people on their legal problems. Elias was not at school for long，for his family could not afford his school 4________(fee) and the bus fare. When he was worried about whether he would be out of work because he didn’t have one passbook, Nelson Mandela told him what 5________ (do).
