Grammar) Choose the correct options to complete the sentences. My mum’s a doctor, so she often ______________ work at weekends. I _________________ write and thank my grandparents for my birthday presents. А must, don’t have to Б has to, must В has to, don’t have to Г should, must Д has to, mustn’t 4 (Grammar) Choose the correct options to complete the sentences. The train leaves at 6, so we__________________ be late. You ________________ go for a run if you want a bit of exercise. А must, have to Б ought, shoudn’t В mustn’t, have to Г mustn’t, should Д ought, have to