Unit 11 Vacations 一. 单项选择。 ? 1. They _____________ to Venice to visit their parents last year. ?????? A. went???????????????? B. go???????????????????? C. are going????????????????? D. goes ? 2. They _____________ the countryside and walked in the mountains. ?????? A. explores??????????? B. explored??????????? C. are exploring???????????? D. explore ? 3. Tom and Kate _____________ a very good time at the party last night. ?????? A. has???? ????????????? B. have????????????????? C. had?????????????????? D. having ? 4. Morons and Daniel _____________ their trip in San Francisco last month. ?????? A. staring???????????????????? B. start????????????????? C. started???????????????????? D. are starting ? 5. In New York, they _____________ the White House last September. ?????? A. visit????????????????? B. are visiting??????????????? C. visits???????????????? D. visited ? 6. They said their vacation _____________ terrible. ?????? A. is????????????????????? B. are??????????????????? C. was????????????????? D. were ? 7. The people here enjoy _____________ after supper. ?????? A. walk???????????????? B. walking??????????????????? C. to walk??????????????????? D. walked ? 8. He _____________ up early every morning. But he __________