【单选题】--Can you do it by yourself? --____.
【单选题】---- Can you do it by yourself? ----
【判断题】在现阶段选择“永动机”作为研究课题违背了科研选题的社会需求性原则。
【单选题】一一Can you do it by yourself? 一一_____
【单选题】— Can you do it by yourself? — ______. [ ]
【单选题】Can you do it all by _____, Jill?