14. The window __________ by the boy. A. has carelessly been broken B. have carelessly been broken C. has been carelessly broken D. have been carelessly broken 16. The teacher needs _______ her students. A. to believe B. to be believed C. believing D. believed 17. The key was found __________. A. in the closet by his brother yesterday B. yesterday by his brother in the closet C. in the closet by his brother tomorrow D. tomorrow by his brother in the closet 18. It is quite expensive, but this detergent __________ better than the cheaper ones ever since it __________ to the market. A. has been sold / introduced B. sells / has introduced C. was sold /been introduced D. has been selling / was introduced 19. The towel doesn’t need _______. A. being washed B. washing C. to wash D. washed

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