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12. --- Why? Tom, your shirt is so dirty!
--- Mum, I ______ my storeroom downstairs.
A. cleaned B. have cleaned
C. was cleaning D. have been cleaning
13. They won’t buy new clothes because they ______ money to buy a new house.
A. save B. are saving
C. have saved D. were saving
14. The traffic in our city is already good and it ______ even better.
A. gets B. got C. has got D. is getting
15. --- I will come to attend your lecture at 10:00 tomorrow.
--- I’m sorry, by then my lecture will have ended and I ______ my guests in my office.
A. is being met B. will meet
C. will be meeting D. will have met
16. --- Alice came back home the day before yesterday.
--- Really? Where ______?
A. has she been B. had she been
C. has she gone D. had she gone
17. I know Mr. Brown; we ______ to each other at an international conference.
A. are introduced B. are been introduced
C. were introduced D. had been introduced
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