题目内容
【题目】I was sleepy, so I shook my head and tried what I was doing.
A. to look forward to B. focusing on
C. to concentrate on D. devoting to
【答案】C
【解析】考查动词短语。A. to look forward to期待；B. focusing on 集中于；C. to concentrate on集中精力于；D. devoting to将…奉献给。句意：我很困乏，所以摇头想集中精力于所做的事。try to do sth.“尽力做某事”，此处用不定式。故选C.
练习册系列答案
举一反三单元同步过关卷系列答案
相关题目