Lucy is unhealthy because she ______ has enough sleep every night.
The students were singing an English song _______ Mr. Xiang came into the classroom.
My _______ is keeping pets. I am _______ in dogs.
Coffee is ready. It _______ very nice! Would you like some?
He is very strong. He _______ lift the heavy box.
Everyone is here _______ Li Lei, because he is ill today.