21. The man died as a result of falling asleep while he drives.

                             A                    B           C                       D

22. I haven’t finished the report yet, but by the time you return I

                   A                                B                                      C

will certainly complete it.

              D

23. Caroline has worn her new yellow dress only once since she buys it.

                            A                        B                        C                      D

24. We’ll be cycled to Hoa’s village at this time next Sunday.

                A                            B         C                  D

25. What will you do when your friends won’t come ?

                 A          B     C                                  D