I can see _________birds in the sky.
These words are important. Please .
When you have difficulty, do remember to _________. Two heads are better than one.
Listen! I hear someone________ the door.
—I’m going to Hainan with my aunt for my holiday after the exam. —_______.
—What do you think of Liu Huan? —Oh, he is my favorite singer. I think no one can sing________.