题目内容
23. Failure as he has been in his previous attempts, he still sticks _________ the research aimed _______ increasing production.
A．in; to B．out; at C．on; in D．with; at
D。
解析:
stick in: 把某物贴在…内; 把…放入…; 将…刺入… ; stick out: 伸出来, 突出; 竖起; 坚持; 断言; stick on: 把(某物)粘贴在…上; 保持在(…)上面; 固定在(…)上面; stick with sb/sth继续支持某人（某事），保持与某人（某事）的联系; (be) aimed at “目的是...”它引导的短语作定语，修饰research.
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