【正文】
o D. have gone 4. Amy was reading a book ___ I came in. A. when B. while C. because D. though 5. I’ ll go to visit my aunt in England ___ the summer holidays start. A. while B. since C. until D. as soon as Answers I. 1. unless 2. as soon as 3. so。 The scientist’ s report was _____ i