课时跟踪检测(四) learning about language & using language ⅰ.完成句子 1．i have_benefited_a_lot_from/by (受益很大) reading different kinds of books. 2．if you can't give up smoking completely, at least try to cut_down (减少)． 3．the family is_deeply_in_debt (负债累累) because of her husband's disease. 4．jack made_such_great_progress (取得了如此大的进步) that everyone was deeply impressed. 5．why are there so many people earning_their_living (谋生) by begging in the city streets? 6．the kind man always helps others without_lim
