We have irrigated the desert area to make it ________ .

The ______ my boss showed was simply due to my failure to make a favorable comment on his management. A: Irritation B: irrigation C: irrigated D: irritated

After Zhengguoqu Canal was built, large farming lands got irrigated in Guanzhong Plain and became fertile. Since then there were no more disastrous years. Guanzhong Plain became the ________of the State of Qin.