You        sudden        discuss         whether         thousand

41．Kate，be careful with the knife or you may hurt　　

42．The manager asked　　he could find the causse of the accident

43．It is reported that there are over thirty﹣five　　works of art in Louvre Museum．

44．When the children were climbing the mountains，a snake　　appeared and scared them．

45．Jack is interested in environmental protection and he often　　the pollution problems with his friends．