Bob and David are friends. ______ of them works in the art club as volunteers.
A. All B. Both C. Each
The boy was seen on the sports ground.
| A．to play | B．play | C．played | D．to playing |
I went to the city, but my parents at home.
| A．got | B．remained | C．staying | D．remaining |
Mary called me to come to the party, but she herself didn’t .
| A．show around | B．show up | C．come out | D．put up |
The strategies that he came up with fine.
| A．work out | B．worked out | C．working out | D．to work out |
These books should provide us all the information we need.
| A．in | B．for | C．with | D．to |