1.  The letters ______ by the secretary at the moment.

2.  The project ______ by the deadline. (obligation)

3.  The results ______ yet. (present perfect negative)

4.  This medicine ______ (take) three times a day. (modal: should)

5.  The new bridge ______ (build) when the accident happened. (past continuous passive)

6.  Three suspects ______ (arrest) so far. (present perfect passive)

7.  The road is being repair.

8.  It must signed before Friday.

9.  The report has been submitting.

1.  are being typed

2.  must be finished

3.  haven't been announced

4.  should be taken

5.  was being built

6.  have been arrested

7.  The road is being repaired.

8.  It must be signed before Friday.

9.  The report has been submitted.