Echo __ for half a mouth.She will come back in two mouth.A.left B.leave C.has left D.has been away

Echo __ for half a mouth.She will come back in two mouth.A.left B.leave C.has left D.has been away He has been away from school for half a year.(该为同义句） He __ __ ___school half a year He has been here for __.A.two and a half monthsB.two and half a monthC.two and half monthsD.two and a half month为什么选A呢? DAVID HELPS HIS MOTHER WITH HER HOUSEWORK EVEY SATURDAY FOR ABOUT __.A:ONE AND HALF HOURSB:A HALF AND AN HOUR C:AN HOUR AND A HALF D:ONE AND A HALF HOURS echo $a,${$a}; echo $a,$$a;echo $a,${$a};echo $a,$$a;有什么区别 Echo of a he waited for you for you for about half an hour .(划线部分提问） __ __ __ he __ for you Two __(half) make a whole填写什么 for /F tokens=2,3 delims=- %a in ('date /T') do @echo %a%b, 同义句转化 1.he has been eating for tow hours he has been eating__ __ __ __(四空）2.i like Chinese tea without anything in iti like Chinese tea__ __ __ __(四空）3.my best friend has been watching sports for three and a half years.my best f echo echo echo . $a = 'hello'; $$a = 'world'; echo $$a; echo $hello; When asked what original intention would lead them to volunteer,about __ said they were willingto do something for the GamesA half of whom B half of them .A为什么不可以 I'm watching a match.It started at 7 p.m and will be on for another half an hour.for another halfI'm watching a match.It started at 7 p.m and will be on for another half an hour.for another half an 用于哪种时态? thanks a lot for inviting me.的同意句thanks you __ __ for __ __ it is hard for me (finish)the nespaper in half an hour(=@__@=)