| A | B |
| The schools, in fact, had only one room, so all the grades study together. | Shift in verb tense |
| Then of course, there is only one teacher, who instructed students at all levels. | Shift in verb tense |
| If the club limited its membershiip, it will have to raise its dues. | Shift in verb tense |
| While Barbara puts in her contact lenses, the telephone rang. | Shift in verb tense |
| Thousands of people will see the art exhibit by the time it closes. | correct |
| By the time negotiations began, many pessimists have expressed doubt about them. | Shift in verb tense |
| After Capt. James Cook visited Alaska on his third voyage, he is killed by Hawaiian islanders in 1779. | Shift in verb tense |
| The moderator asks for questions as soon as the speaker has finished. | correct |
| Everyone hopes the plan would work. | Shift in verb tense |
| Harry wants to show his friends the photos he took last summer | correct |
| Scientists predict that the sun will die in the distant future. | correct |
| The boy insisted that he has paid for the candy bars. | Shift in verb tense |
| The doctor suggested bed rest for the patient, who suffers from a bad cold. | Shift in verb tense |
| The ocean contains rich minerals that washed down from rivers and streams. | Shift in verb tense |
| About noon the sky darkened, a breeze sprang up, and a low rumble announces the approaching storm. | Shift in verb tense |
| Yesterday we had walked to school but later rode the bus home. | correct |
| I will get to the airport any way I can, and then I will board the plane. | correct |
| The rain splattered on the windshield as I drove to the store. | correct |
| Just as Pam was putting away her book bag, her daog runs past her. | Shift in verb tense |
| Ben is fixing the vase he broke last week. | correct |
| I will always love dogs because of the years I spent with my dog McDuff. | correct |
| At the carnival, Susie rode the Ferris Wheel and Bill is playing arcade games. | Shift in verb tense |
| I broke my leg two weeks ago, and the cast will come off next month. | correct |
| After school, I will go to band practice and then I will stop at the store on the way home. | correct |
| Jim headed out the door as he calls out a good-bye to his friends. | Shift in verb tense |
| Jims heads out the door as he calls out a good-bye to his friends. | correct |
| At the carnival, Susie is riding the Ferris Wheel and Bill is playing arcade games. | correct |
| Andy raised his hand because he wants to answer the question. | Shift in verb tense |
| Andy raised his hand because he wanted to answer the question. | correct |
| It was amazing to see that the dog barked as he jumps over the couch. | Shift in verb tense |
| It was amazing to see that the dog barked as he jumped over the couch. | correct |
| Ava runs ten miles a day because she will run in a marathon next month. | correct |
| A very few countries produce most of the world's illegal drugs, but drug addiction affected many more countries. | Shift in verb tense |
| A very few countries produce most of the world's illegal drugs, but drug addiction affects many more countries. | correct |
| Keep your eye on the ball, and you should bend your knees. | Shift in verb tense |
| Keep your eye on the ball, and bend your knees. | correct |
| The newspaper covers local events, but it did not appeal to many student readers. | Shift in verb tense |
| The newspaper covers local events, but it does not appeal to many student readers. | correct |
| Clarrisa yowled until her owner looks up. | Shift in verb tense |
| Walk over to the field house, and then you should get in line. | Shift in verb tense |
| Walk over to the field house, and then get in line. | correct |