So difficult ____ it to live in an English-speaking country that I determined to learn English well.
At the railway station, the mother waved goodbye to her daughter until the train was _______.
The medical team _______ two doctors and six nurses was sent to the front.
Mr. Lee is ______ to show up at the meeting.
The number of students in our school _________ by 5 % every year.
After the new type of rice was introduced, the farmers produced _______ rice this year as last year.