[基础回顾] Ⅰ.单句语法填空(导学号02516084) 1．The experiment performed (perform) in the 1990s showed that many plants tolerate a wide range of light conditions. 2．She pretended to be doing (do) her homework when her mother came in. 3．After graduation，he has been working in a middle school which is attached (attach) to Nanjing Normal University. 4．Xi delivered keynote speech at BRICS Business Forum， calling (call) for more people to benefit from international cooperation. 5．Walking is a good form of exercise for both the young and the old. 6．He was confident (confidence) that he would be admitted to the famous university. 7．Maria has written two novels，both of which have been made into television series. 8．After months of unemployment all he asked for was a chance to earn (earn) his bread. 9．As is often the case in nature，some plants are so sensitive to temperature that they can only survive in cool places. 10．We appreciated his
