The manager was satisfied to see many new products ______ after great effort.
| A．having developed | B．to develop |
| C．developed | D．develop |
Who is it up ____ decide whether to go or not?
| A．to to | B．to | C．for to | D．to for |
Wang Mei is one of many Chinese teenagers _____ “on the go”
| A．who lives life | B．who live life | C．that lives living | D．that live living |
The two boys fought and fought until one ______.
| A．gave up | B．gave in | C．gave | D．gave off |
He will _____ our class to sing at the school singing contest.
| A．take place of | B．stand for | C．represent | D．representative of |
----Where is Mary? ----At ____.
| A．Mr. Brown's | B．the Browns | C．Mr. Browns | D．the Mr. Browns' |