Students often spend lots of time _____ their homework. A to do B do C did D doing
This __________my quilt,These __________my books.
--What’s this__________ English? --It’s a pen.
--Is this a __________? --No.It’s a clock.
--Is this __________card? --Yes. ___________card is Tom’s.
Frank is my pen pal, he _____________ Sydney, Australia.