—We 'll go camping tomorrow morning, I promise.
—Maybe by then you your mind.
| A．changed | B．are changing |
| C．will have changed | D．have changed |
______ the terrible earthquake in Japan not happened, people’s awareness _______drawn to the risk of being exposed to nuclear radiation.
| A．If; wouldn’t have been | B．If; wouldn’t have |
| C．Had; wouldn’t have been | D．Had; wouldn’t have |
_____ of their bad habits, the boys switched from being dependent on their parents to _____ for others.
| A．Having rid; sacrificing | B．To rid; sacrifice |
| C．Rid; sacrificing | D．Having been rid; sacrifice |
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 |
To some extent, uncontrolled information from the website that many people turn _______ false.
| A．to prove | B．to proves | C．prove | D．proves |
People who tend to focus on ______ while speaking a foreign language may find that they worry too much about making mistakes.
| A．fluency | B．agency | C．policy | D．accuracy |