In the ant city, you will see many problems _____ in this way.
| A．settled | B．settling | C．to be settled | D．to be settling |
--- What is Rudi up to?
--- Rudi is bent finding a new job.
| A．on |
| B．to |
| C．down |
| D．over |
--- Why did you play the music yesterday?
--- Because it can old times.
| A．call on |
| B．call for |
| C．call in |
| D．call up |
The explorer got a disease in blood for the of fresh vegetables and fruit.
| A．sake |
| B．lack |
| C．ignorance |
| D．benefit |
To achieve your goal,yourself and your direction the most important thing.
| A．knowing;is |
| B．to know; were |
| C．know; was |
| D．and know; are |
Scientists ______ thousands of chemicals before they decided on the right one in the end.
| A．tried out |
| B．found out |
| C．worked out |
| D．turned out |