13.Busy _______ she is, Rita ______ two hours every Sunday afternoon to spend with her son.
The UN system is a major purchaser of goods and services ,_______over $4 billion a year .
I can’t tell you the exact time when I will get there ._______,I’ll be there as early as I can .
We should not judge a person by his _______and the clothes he wears .
As we sped down the highway ,the lights of the city ________before us .
Hiking by oneself can be fun and good for health .It may also be good for _______building .