We'll have a picnic in the park this Sunday ________ it rains or it's very cold.
| A．since | B．if | C．unless | D．until |
You did not perform as well as the other competitors--- ,you failed.
| A．in the end | B．after all |
| C．in other words | D．at the same time |
I like getting up very early in summer. The morning air is so good ______.
| A．to be breathed | B．to breathe |
| C．breathing | D．being breathed |
The fire made _____ difficult to rescue the people trapped under the ruins in the earthquake.
| A．/ | B．this | C．that | D．it |
The mother waved to her daughter until the train .
| A．out of sight | B．got out of sight |
| C．caught sight | D．lost sight |
He hurried to the station only that the train had left.
| A．to find | B．finding | C．found | D．to have found |