The father __________________ (哀求) his son to be less trouble to his mother.

填空题The murderer ____________ (混在人群当中)with an attempt to shoot at the Prime Minister whenever he seized a chance.

填空题Scientists will have to ______________ (提出提高世界粮食供应量的新方法).

填空题they are likely to drop out of school and less likely to succeed in life

填空题explained

单项选择题A．which is grippingB．to gripC．grippedD．gripping