I was trying to get into the _____ bus when I heard a voice from behind.
I was trying to get into the \_\_\_\__ bus when I heard a voice from behind.
复数
A number of cars _____ in front of the park.
A number of cars \_\_\_\__ in front of the park.
He was one of the boys who _____ late for class.
He was one of the boys who \_\_\_\__ late for class.
Large quantities of water _____ needed for cooling purposes.
Large quantities of water \_\_\_\__ needed for cooling purposes.
In March when spring is already here, we usually plant many young trees on both side of the street.
In March when spring is already here, we usually plant many young trees on both side of the street.
虚数i的奥秘 : 从数的诞生到复数.pdf
本书系统全面地介绍了虚数i的有关知识，循序渐近地讲述了从数的诞生到复数的应用，叙述浅显易懂，可读性强。
Florida’s busiest airport will be the first in the country to scan face of all passengers.
Florida’s busiest airport will be the first in the country to scan face of all passengers.
_____ of the two brothers are fond of classical music.
\_\_\_\__ of the two brothers are fond of classical music.
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