1、Nothing but cars               in the shop.

A．is sold  B．are sold 

C．were sold  D．are going to sell

2、No one except Jack and Tom        the answer.

A．know  B．knows 

C．is knowing D．are known

3、Seventy percent of the students in our school        from the countryside.

A．is   B．are  

C．comes  D．are coming