We work together to achieve our common purpose： ______ world that is safer, cleaner and healthier than______ one we found．
| A．the；the | B．a；不填 | C．a；the | D．the；不填 |
I have a big brother. ___ name is Paul.
A.Her B. His C. My
I’m going to be ___ basketball player.
A.a B. the C. an
Either the guides or the team leader ________ looking after the students then.
| A．are | B．were | C．is | D．was |
When _______ comes to advertisements, we must all use our intelligence.
| A．that | B．it | C．there | D．this |
As they were walking around, they noticed a man _______ against a tree.
| A．sit | B．to sit | C．sitting | D．Sat |