1．You must ________ what the teacher explains in the class, or you will not be able to grasp the main points of the knowledge.
A．pay attention on B．take notice of
C．learn from D．focus on
答案与解析：D 句意：你在课堂上必须集中精力听课，否则你就无法掌握知识要点。focus on“集中(注意力、精力等)于”，为固定搭配，相当于pay attention to，由此可知D项正确。take notice of “注意到”；learn from“向……学习”。
2．Generous public funding of basic science would ________ a good many benefits for the country's health, wealth and security.
A．result from B．lead to
C．lie in D．settle down
