A simple 45-minute operation __________ by scientists is hoped to cure blindness in six years.
| A．being developed |
| B．developed |
| C．to develop |
| D．developing |
---Did you listen to the lecture?
---Yes, I have never heard a ___________ one.
| A．more exciting | B．more excited | C．most exciting | D．most excited |
Travelling, talking with friends and relatives, and other forms of relaxation are very likely to _______ the well-being of metal health.
| A．contribute to | B．blow up | C．put up | D．carry on |
My elder brother has gone to Tibet to work as a volunteer teacher. Influenced by him, I also want to become_______when I graduate from the university.
| A．that | B．it | C．this | D．one |
People living in the desert choose to keep their ancient lifestyles and customs, _______people in cities throw away their cultural traditions.
| A．when | B．if | C．unless | D．while |
The band played many songs, some of my favorites _______.
| A．including | B．included | C．include | D．to include |