His job at the hospital did not pay much, so he found another .
A. on the rise
B. on the spot
C. on the decline
D. on the side
网友回答
A. on the rise
B. on the spot
C. on the decline
(答案→)D. on the side
解析： on the side(=in addition to a main thing) 额外；作为兼职：1）He ordered a hamburger with onions and French fries on the side. (=He ordered a hamburger with onions and French fries extra.) 2)He does some house-keeping work on the side.(他帮人家做些家务活作为兼职。)on the rise(作表语)在上升；on the spot 现场；on the decline (做表语)在下降：The population in the country is on the decline. (这个国家的人口在下降。)