–It’s hard work to achieve a balance between schoolwork and hobbies.
–So it is, but we have to.
| A．a | B．an | C．the | D．不填 |
Please come to my house whenever you are______.
| A．uncrowded | B．fascinating |
| C．convenient | D．inexpensive |
－Could you tell me________ yesterday?
－I went bike riding with my classmates.
| A．Why you like your new classmates |
| B．What did you do |
| C．How you speak English well |
| D．What you did |
The police warned the thief _______again.
| A．not to steal | B．to not steal |
| C．not steal | D．not stealing |
I wonder_____ they will pass the exams or not.
| A．if | B．whether | C．that | D．what |
The light______ by Edison is helpful for people.
| A．invent | B．invents |
| C．invented | D．inventing |