Chia động từ trong ngoặc: 21. He usually ( leave) his office at seven o’clock, but this week he ( work) later. 22. They ( not go) to the cinema very often but when they (go) they ( prefer) comedies. 23. Those two sisters already ( speak) four foreign languages; now they ( learn) the fifth. 24. He usually ( get up) at about seven o’clock; but this month he (be) on holiday and so he (get up) later. 25. My dog usually ( bark) at the postman- but look at that ! For once, he ( be) friendly to the poor man. 26. They left for England this morning. I (wonder) whether they ( travel) by air or by train. 27. I usually ( write) my letters on Sundays but ( write) this week’s letter today because this morning Sunday we ( go) out. 28. She ( have) birthday party tomorrow and she (look) forward to it very much. 29. I ( smoke) a lot those days because I ( study) for my final examinations. I always ( smoke) a lot when I ( study). 30. I ( not like) garlic when I ( smell) it but I (love) it when I (taste) it.