— Are there any boys in the classroom? — , they’re in the lab. A. Yes, there are. B. Yes, they are C. No, there aren’t
The police warned the thief _______again.
I wonder_____ they will pass the exams or not.
The light______ by Edison is helpful for people.
—________do you practice your pronunciation? —I practice it _____ asking the teacher for help.
----Can you explain ______________________________, especially my writing? ----Of course. It’s my pleasure.