19.Frank took _____ of the fine weather to do a day’s work in the garden.（ ）

A.interest

B.chance

C.advantage

D.charge

19.C【解析】take advantage of sth.为固定搭配，意为“利用，发挥……的优势”。故选C。

20.—How did Mike get his car out of the ditch？

—_____it.（ ）

A.To push

B.From pushing

C.By pushing

D.Havin pushed

20.C【解析】题干特殊疑问句的疑问词为“how”，表明针对方式的提问。句意：—Mike是怎么把他的车从沟里弄出来的？—他把车推出来的。by doing sth.表方式、手段、方法，故选C。