4.Tom told me that after a few years in China not only____his Chinese, and that he had also obtained more interest.
Our teacher said to us that the earth _________ around the sun.
While _________, people sometimes can’t help buying something they don’t really need.
Alexander tried to get his work ______ in the medical field.
You __________ buy a gift, but you can if you want to.
John thinks it won’t be long ________ he is ready for his new job.