there is a small desk behind the computer

there is a small desk behind the computer 关卡1 There is a computer on the small desk next to the sofa.（ There is a computer game on the desk 改为复数 There is a computer on the desk改成一般疑问句 is computer there on desk the a .连词成句 There _______a computer on the desk.A.is B.have The computer is behind the desk.（改同义句） there is （a big desk） in my bedroom.the trash bin is (behind There( )a computer and two books on the desk.A are B is There is a computer _______ the desk.A.on B.in C.under D.for There is a computer on the tencher’s desk.改成肯定句 There is a computer on the desk.(划线部分提问） --------------