8. complete the sentence: “you … come to the lesson. it was optional” а) couldn’t б) mustn’t в) didn’t have to г) shouldn’t 9. choose suitable tense for each sentence. i am writing in connection with the advertisement which (a) appeared / (b) has appeared on 12 april. i now (a) completed / (b) have now completed a postgraduate degree in administration. (a) i’ve been trying / (b) i’ve tried to find a permanent job for a considerable time. indeed, (a) i have already worked / (b) i have already been working for several companies on a temporary basis. the last job (a) i applied / (b) have applied for required applicants to speak some japanese. а) 1 - b, 2 - a, 3 - a, 4 - a, 5 - b; б) 1 - a, 2 - a, 3 - b, 4 - a, 5 - b; в) 1 - a, 2 - b, 3 - b, 4 - a, 5 - a; г) 1 - a, 2 - b, 3 - a, 4 - a, 5 - a;