If someone has an accident and can no longer walk, scientists might be able to use stem cells to ___ the damaged cells and allow that person to walk again.
| A．rescue | B．remove | C．reserve | D．replace |
The idea “happiness, ” ________, will not sit still for easy definition.
| A．to be rigid | B．to be sure | C．to be perfect | D．to be fair |
She was put under house arrest two years ago but remained a powerfulin last year's election.
| A． | symbol | B． | portrait | C． | identity | D． | statue |
—What a mess! You are always so lazy!
—I’m not to blame, mum. I am ________ you have made me.
| A．how | B．what | C．that | D．who |
Top graduates from universities are ________ by major companies.
| A．chased | B．registered | C．offered | D．compensated |
Tom always goes jogging in the morning and he usually does push-ups too to stay ________.
| A．in place | B．in order | C．in shape | D．in fashion |