21£®—Each of the students in No. 4 Middle School, works hard at his or her lessons, __________ to go to university some day.

—So do I.

A. to hope                B. hopes                       C. hoped                         D. hoping

22£®I ____ along the street looking for a place to park ___    the accident happened.

A. went, when         B. went, while                C. was going, when         D. was going, while

23£®The teacher asked a difficult question, but finally Ted ____ a good answer.

A. came up with     B. kept up with               C. went through with        D. put up with