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21. There is ___________ “s” and __________ “u” in the word “student”.
A. a, a B. an, an C. a, an D. an, a
22. We often go to school _______ 8:20 ________ the morning.
A. in, at B. at, in C. at, on D. on, in
23. There _________ a green skirt and two blue blouses on the bed.
A. is B. are C. be D. have
24. -----Whose model plane is it? ------It’s ________.
21. There is ___________ “s” and __________ “u” in the word “student”.
A. a, a B. an, an C. a, an D. an, a
22. We often go to school _______ 8:20 ________ the morning.
A. in, at B. at, in C. at, on D. on, in
23. There _________ a green skirt and two blue blouses on the bed.
A. is B. are C. be D. have
24. -----Whose model plane is it? ------It’s ________.

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