根据句意，用括号内所给单词的适当形式填空。
1. Five ________ of the students in our school suffer from stress. (nine)
2. Reading is a way to bring us much _________. (please)
3. Minnie is one of the ________ mice I've ever seen. (pretty)
4. We've just been told that we need to clean our room first and ________ a little later. (they)
5. The trousers are too long for me. Would you please help me cut two ________ off? (inch)
          the students in this primary school is about four thousand, and           of them are boys.
[     ]

A. A number of; three fifth
B. A number of; three fifths
C. The number of; three fifth
D. The number of; three fifths

This is a big class, and ______ of the students are girls.
[     ]
A. two third
B. second three
C. two thirds
D. two three
In our class ______ of the students ______ girls.

[     ]

A: three fifths; are
B: three fifth; are
C: three fifths; is
D: three fifth; is
______ of the information about the show ______ downloaded from the Internet.
[     ]
A. Three-fourths; were
B. Three-fourths; was
C. Third-fourths; were
D. Third-fourths; was
—How many girls are there in your class?
—There are 60 students in our class. _______ of us are girls.
[     ]
A. one seconds
B. one second
C. first two
D. one two
_______ of the land in that district _______ covered with trees and grass.

[     ]

A. Two fifths;  is
B. Two fifth;  are
C. Two fifth;  is
D. Two fifths;  are
Nowadays ______ of business letters are written in English.
[     ]
A. two third
B. two thirds
C. two three
D. second three.
In our class, _____ of the students are boys.
[     ]
A. two third
B. two three
C. two thirds
______ of the boys like playing basketball and football.
[     ]
A.Three fourth
B.Third four
C.Three four
D.Three quarters
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