The mobile phone has influenced people’s life a lot since it ____.
| A．invents | B．invented |
| C．has been invented | D．was invented |
Though Mandela﹙曼德拉﹚____27 years in prison﹙监狱﹚, he thought it meaningful.
| A．planned | B．spent | C．happened | D．waited |
You should read the article as ____ as I do to know what the writer really wants to tell us.
| A．careful | B．more careful | C．carefully | D．more carefully |
--________do you go to the dentist?
--Let me see, twice a year, maybe.
| A．How many | B．How much | C．How often | D．How soon |
—Did you do __________ on vacation?
---Not really. I just stayed at home and helped mom.
| A．something special | B．anything special | C．something serious | D．anything serious |
—He can write well.
---He_____, but he doesn’t. He’s too lazy.
| A．must | B．mustn’t | C．can | D．can’t |