(2013·潍坊高考模拟)Air pollution is getting more and more serious，so we must take action________it is too late.
A．before B．after
C．until D．when
(2014·温州第一次适应性测试)The footballer didn’t succeed in scoring，though________several chances by his teammates.
A．was given B．being given
C．giving D．given
(2013·济南3月模拟)You should study the details of the policy________before you sign it.
A．in return B．in advance
C．at ease D．on purpose
(2014·辽宁大连高三双基测试)Jogging every morning is________good habit.Stick to it，and you’ll make________great progress.
A．a；/ B．a；a
C．the；a D．/；/
(2014·河南省普通高中适应性测试一)—Could you tell me how to get to the town hall，please?
—________.Maybe you could ask the policeman over there.
A．A piece of cake B．That depends
C．I don’t care D．I don’t know for sure
进入高三后，学习任务重、压力大，因此，有效的学习显得尤为重要。请根据你的切身体会，从合理安排、劳逸结合等方面谈谈你对有效学习的看法。字数120左右，可适当增加内容。
