第一节单项填空（共10小题；每小题1.5分，满分15分）
从每题所给的A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
1. If you want to speak English without _______foreigner's accent, you have to learn ________correct pronunciation of those words.
A．the；a B．a；the C．a；不填 D．the；不填
2.The MH370 from Malaysia crashed in the southern Indian Ocean,________global concern about flight safety.
A. to cause B.caused C.causing D.having caused
3. A1l the candidates are required to be at the Conference Hall at 2:00 pm________ otherwise
informed．
A. unless B.if . C.while D.though
4. Although faced with stress from constant exams, she lost________ of her enthusiasm for
study.
A. some B.neither C.none D.all
