EXERCIS E A1 : Conmbine these pairs of sentences using "sothat" : = cách nâng cao 6/ Those lessons are very difficult. He can't understand them. __________________________________ 7/ She was very busy. She couldn't do the housework. ________________ __________________________ 8/ The climate was very bad. All the plants couldn't grow well. _______________ ______________________________ 9/ I'm very tired. I couldn't keep my eyes open. ________________ __________________________ 10/ That boy is very lazy. He never does his homework. ___________ _______________________________