阅读下面短文，按照句子结构的语法性和上下文连续的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卷标号为的相应位置上。 Roadside bomb explosions in southern Afghanistan have killed at least five civilians and five policemen. The attack came as NATO’s new Secretary General visited Kabul 小题1: (discuss) with Afghan officials and candidates ahead of the August 20 小题2: (president) election. Afghan officials in southern Helmans province said a group of civilians 小题3: (travel) to a wedding party when 小题4: big vehicle, which was being pulled by a tractor, hit a roadside bomb. Officials have blamed Taliban insurgents（叛乱分子）as part of efforts to discourage voters 小题5: taking part in the coming election. Five policemen were also killed in a separate roadside bomb burst in Helmand, 小题6:region is a known Taliban stronghold（据点） 小题7: thousands of US Marines and British soldiers are engaged 小题8: major anti-insurgency operations to improve security 小题9: Afghans go to vote. The security situation deteriorating（恶化）in southern parts of the country has been a cause of concern for both Afghan election officials and international observers since the 小题10: (remove) of the Taliban from power in 2001.