1) put in a/an or the: … captain ordered … crew to unload … vessel. 2) use correct prepositions: one hot summer morning we decided to take a trip … our car … the city … the ocean. we got … the car and drove … the highway. 3) put the following into the passive voice: the manufacturers can deliver the machine at the end of the month. 4) put the verbs into the correct tense: the schoolchildren (enter) the classroom ten minutes after the bell (ring).