The government has made a big effort to tackle the two most important _______ issues of our country. 

Jenny has an _______ command of Japanese cuisine. 

By the time the software _______ on sale next month, the company ______ $2 million on developing it. 

The new airport has ______ a lot of changes on this island. 

The excursion is ______ unique opportunity to discover _______ wild in its natural beauty.

Pat, put all your toys away _______ someone slips and falls on them. 

Vietnam has played _______ high spririts and had an impressive 2-0 victory over Yemen. 

Mark the letter A, B, C or D on your answer sheet to indicate the most suitable response to complete each of the following questions.

- Mother: “How come you didn’t tell me that you would quit your job?”

          - Lisa: “__________.”