【2015·陕西】Back from his two-year medical service in Africa, Dr.Lee was very happy to see his mother______ good care of at home.
He spoke so slowly that we all could ___ him.
I ___in North China, but now I ___ the weather in South China.
I have no idea __ the Greens has moved to Hangzhou or not.
---Is he here now?---No, I ___ he ___ here by now.
My brother tried ___, but still he couldn't work out this maths problem.