--When did your father ______ your mother? -- About 15 years ago.
Next term my sister ________ to draw pictures.
—_____ she have breakfast this morning? —No. She left home _____ breakfast.
Xi’an is one of ______ capital ______ in China.
If we keep planting trees, our country will become ______.
— do your parents go to the movies? —Once a month.