It is necessary that our drinking water _____ cleaner.
It is necessary that our drinking water _____ cleaner.
The vacuum cleaner is a valuable labor-saving ______.
The vacuum cleaner is a valuable labor-saving ______.
Which of the following is a household robot? A: A sweeper B: A surgery robot C: A robotic vacuum cleaner D: A robotic pool cleaner
Which of the following is a household robot? A: A sweeper B: A surgery robot C: A robotic vacuum cleaner D: A robotic pool cleaner
Language belongs to each member of the society, to the cleaner ____ to the professor.
Language belongs to each member of the society, to the cleaner ____ to the professor.
The ____ are cleaning the room. A: clean B: cleaners C: cleaner
The ____ are cleaning the room. A: clean B: cleaners C: cleaner
What’s the thing they are talking about（） A: A special car. B: A washing machine. C: A cleaner. D: A robot.
What’s the thing they are talking about（） A: A special car. B: A washing machine. C: A cleaner. D: A robot.
2. Hydroelectric power plants in a much cleaner way than coalfired ones.(generate)
2. Hydroelectric power plants in a much cleaner way than coalfired ones.(generate)
The vacuum cleaner is a valuable labor-saving ______. A: device B: engine C: piece D: instrument
The vacuum cleaner is a valuable labor-saving ______. A: device B: engine C: piece D: instrument
Michael's vacuum cleaner squealed loudly, shook violently, and filled the air with dust.
Michael's vacuum cleaner squealed loudly, shook violently, and filled the air with dust.
What does Tony do A: He’s a gardener. B: He’s a farmer. C: He’s a cleaner. D: He’s a planter.
What does Tony do A: He’s a gardener. B: He’s a farmer. C: He’s a cleaner. D: He’s a planter.