________ headmaster Smith is quite good at painting and it is said that he is _______ Picasso.

So fast ________ that I could not catch up with them. [ ]

Are those books on the desk yours— _____. Mine are here.

I’m worried about my English.-_______ harder, _______ you will catch up with your classmates.

I’d like to start my own business next year – that’s _________ I will face my big challenge in life