1. He set out soon after dark _____________ home an hour later. ª¤

A. arriving¡¡¡¡¡¡¡¡¡¡   B. to arrive¡¡¡¡            C. having arrived¡¡              D. and arrivedª¤

2. She's upstairs _____________ letters.

A. writes                      B. is writing                  C. write                        D. writingª¤

3.  _____________ from heart disease for years, Professor Li has to take some medicine with him wherever he goes. ª¤

A. Suffered                                                             B. Sufferingª¤

C. Having suffered                                           D. Being sufferedª¤

4. We haven't seen each other for years, which made me unable to ____________ him at first. ª¤

A. realize                      B. understand                C. recognize                 D. know

5.  _____________ this road and you'll get there. ª¤

A. Following                 B. Followed                  C. Follow                     D. To followª¤

6. When we speak, we should at least _____________ ourselves understood.