Complete the sentences using is or are. 3.Mathematics ... one of my favourite subjects.4. His brilliant knowledge of the area ... going to help us.5.The scissors ... very sharp.Be careful.6.Her clothes ... usually very tidy.7. I'm afraid that your luggage ... lost.8.Athletics ... fun.You must join us tomorrow.9.What ...the news?Is your friend better?10.Rice ... good for you.Have some more.