When it ______ research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.
| A．refers to | B．related to | C．comes to | D．talks to |
People often think they are energetic and healthy and don’t need exercise. _______ , I have to warn that it is completely wrong.
| A．However | B．Therefore | C．Otherwise | D．Meanwhile |
Everybody’s fingerprints are _______, so the police can easily find the thieves if any is left when they are stealing.
| A．convenient | B．unique | C．rough | D．severe |
He had to take the medicine three times a day, so as to be _____ the pain in the leg.
| A．far from | B．away from | C．apart from | D．free from |
Our foreign English teacher Shirley has a gift for creating an atmosphere for her students _________ allows them to communicate freely with each other.
| A．which | B．where | C．what | D．who |
This basketball team had lots of excellent players, so its fans never expected that it ____ have failed in the final.
| A．must | B．might | C．should | D．need |