31.When you (come) what your friends (do)? 32. When Nam (go),we(sleep) well and what you(do)? 33.When I (see )you, who yoy (talk) to? 34. When you(build?0 this house? 35.At the moment she(do) her homework 36.He usually (do) her homework, (wash) clothes and(watch)TV in the evening 37.While Ba ( plant) trees, I (water) them 38.While I (read) book,she (sing) 39.While they (play) soccer, we (play) tennis 40.While Lam (write) an essay, my sister(write) letter 41. I (practise) speaking English while my brother (listen) to music 42. We(have) cakes while they(eat) sweets 43.She(wait) fore Tom while Tom (sleep) well 44.He (watch) TV while they (sing) 45.What you(do) while they (fight) your brother? 46.What she(do) while you(be) at school? 47. What they (do) while he (cut) the flowers? 48.While her husband ( cook), what she (do)? 49.While your teacher (explain) the lesson, what you(do)? 50.What you(do) between seven and eight last night?We (have) dinner