在当前目录下通过以下命令创建了两个文件:touch doc01.txt touch doc02.txt 则以下可以删除所有txt后缀文件的脚本是 A: for f in "$(ls *.txt)";do echo rm "$f";done B: for f in *.txt;do /bin/rm $f;done C: for f in *.txt;do /bin/rm "$f";done D: for f in $(Is *.txt);do echo rm "$f";done

Homework____________on time will lead to better grades.A. done B. having done C)) be done D. to A: having done B: done C: be done D: to have been done

下列哪个表述是 “牛排几分熟”的英文表达?( ) A: hardly done B: rare medium C: medium rare D: medium E: medium well F: well done

It is necessary that something urgent ______ to combat smuggling. A: is done B: be done C: has to be done D: must be done

My suggestion is that the experiment ______ in another way. A: is done B: will be done C: has been done D: be done

哪个选项不是正确的完成时态? A: have/has done B: had done C: will has done D: will have done E: would have done

It’s not a good habit to leave your work __________ . A: done half B: half done C: a half done D: done a half

It’s high time ______ about the traffic problem． A: something was done B: everything is done C: anything will be done D: nothing to be done

It’s high time _____ about the traffic problem. A: anything will be done B: something was done C: nothing be done D: something is done

It's time that ______ about the traffic problem downtown. A: something was done B: anything will be done C: everything is done D: nothing to be done