It is fairly common in Africa for there______ a group of expert musicians surrounded by others who also join in the performances.
He ___ at the enemy, without saying a word.
She didn't answer the phone.She ___ be asleep.
___ people gather there, talking about the film about Comrade Lei Feng.
I can't remember where I have put that book.Maybe they are ___ which one is not correct.
More than one student ___ that experiment.