【单选题】
The prices of the agricultural products have been ____ steadily in the past few years.
【单选题】
Employment _______ in the past two years.
【单选题】
The big shot ______ several government officials in the past years.
【判断题】
The past 22 years have really been amazing, and every prediction we’ve made about improvements have al come __true__
【单选题】
Great changes __________ in our institute in the last few years.
【单选题】
Tom has been a vegetarian ____ principle for years.
【判断题】
He has been in china for three years.
【单选题】
The city ____ its birth-rate by almost 60% in the past 20 years.
【单选题】
The city ______ its birth-rate by almost 60% in the past 20 years.
【单选题】
The population of many Alaskan cities has __________ doubled in the past three years.