21. We tried to _______ his doubts and let him tell the truth.
A. replace B. review C. remove D. rebuild
22. Tom admitted ______ in the examination and he was not admitted _____ the school at last.
A. to cheat; to B. cheating; to C. to cheat; as D. cheating; as
23. These plants are watered___________
A. each other day B. every other day C. each of two days D. every of two days
