D. an 180 feet-high
答:C。连字符所连的词做定语时,不用复数形式。
5. Shortly after the accident, __________ policemen were sent to the spot to keep order.
A. dozens of
B. dozen
C. dozen of
D. dozen
答:A。dozens of 数十
6.
There were __________ people in the room.
A. two score of
B. tv0o scores of
C. two score
D. two scores
答:A。score与数词,many,several等词连用时,用单数形式.score后常接of,
如two score of eggs。但scores of 表示笼统的数字,意为“数十个”。
7. __________of the students in our class are from the north.
A. Two nineth
B. Two ninth
C. Two ninths
D.
Two ninetbs
答:C.分数词的表示法:分子用基数词,分母用序数词,当分子大于l时,分母用复数的形式。9的序数词为ninth。
8. She bought her son two __________ pencils.
A. dozen of
B. dozens
C. dozen
D. dozens of
答:C.dozen与数词连用,不用复数,另外dozen后一般不与of连用,若接of时,后应有the,these,those等限定词或them,如I want three dozen of the / these / those pencils或I want three dozen of theme。
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