17、 “Wendy has a terrible cold.

　　“How long__________ it?”

　　A.has she had

　　B.she has had

　　C.had she

　　D.she has

　　18、 MaIlv new__________ will be opened up in the future for those with a university educa-tion.

　　A.opportunities

　　B.capabilities

　　C.realities

　　D.probabilities

　　19、 The man who thought of__________a gas engine with wheels was the inventor of thautomobile.

　　A.contacting

　　B.connecting

　　C.uniting

　　D.combining

　　20、 The early pioneers had to__________ many hardships to settle on the new land.

　　A.go along with

　　B.go back on

　　C.go through

　　D.go into