I believe that human cloning is wrong. If we toy with nature, we will have to deal with the _______.
| A．concepts | B．conflicts | C．consequences | D．credits |
Feudal landlords, and imperialists are in no way more _____ than wolves.
| A．reasonable | B．regardless | C．ridiculous | D．rational |
She was putting on her watch when the _____ broke and it fell to the ground.
| A．belt | B．strap | C．tie | D．string |
Psychological studies show that some people are quick-tempered _____.
| A．at heart | B．on purpose | C．in person | D．by nature |
The _____ stuck on the outside of the envelope said "By Air".
| A．label | B．ticket | C．signal | D．sign |
It was the largest experiment we had ever had; it _____ six hours.
| A．ended | B．finished | C．prolonged | D．lasted |