I’m not good at Maths, so I don’t know _________ out this difficult Maths problem.
— Hi, Maria. Your skirt is very nice. —____
— These clothes are very nice. Could I_____? — Sure.
My name ____ Jack. Liu Ying and Sun Mei ____ my friends.
— ____ skirt is this? — It's hers.
— ____ — She is a nurse.