In 1969 two American astronauts ______ on the moon and walked on its rocky, dust

游客2023-10-11  34

问题 In 1969 two American astronauts ______ on the moon and walked on its rocky, dusty surface.

选项 A、concentrated
B、based
C、landed
D、focused

答案 C

解析 concentrate的意思是“专心,集中”,例如:I tried to read a few pages,but I found it hard to concentrate.我试图看几页,可是很难集中精力。base的动词意思是“以……作基础”,例如:Their relationship was based upon mutual respect.他们的关系是以相互尊重为基础的。focus的动词意思是“(使)聚焦,集中”,例如:He stared out the window for a moment,trying to focus his thoughts.他朝窗外凝视了一会儿,试图使自己集中精力。
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