He must stay at home to look after his ____ mother . She has been _____for a week.A, ill . sick, B. sick ,ill C. ill ; ill D. sick ; illness
Is this _______bike? No.________ is over there.
It’s snowing heavily outside. Put on your coat,_________ ,you’ll catch a cold.
What_______useful book it is! Yeah,it tells you how to play ______violin.
-We must act now because time is _____. -Yes. Let’s start.
We should _____ the power when our TV or computer is not used.