对变量赋值，以下命令中正确的是
A
暂无解析
Herefusedtotelluswhetherhe________(undertake)thejob.
则下列结论正确的是（）
Tosucceedinascientificresearchproject________.
Hefellasleepimmediatelylastnight;hemust________(be)verytired.
Iknowitisn’timportantbutIcan’thelp________aboutit.
