Pencils are sold by at( by, at ) dozen.
（鉛筆以打為單位出售。）
She is younger than I by at during( by, at, during ) two years.
（她比我小兩歲。）
My house is beside at along( beside, at, along ) the river.（我的房子在河邊。）
That man stands by at down( by, at, down ) the car.（那個人站在車子旁。）
It must be finished by till( by, till ) the end of this week.
（最遲在本星期結束以前必須把它完成。）
My brother did not return till by( till, by ) ten o'clock.
（我弟弟一直到十點鐘才回來。）
A stone fell down along under( down, along, under ) the hill.（一塊石頭落到山下。）
The moon has risen above up down( above, up, down ) the horizon.
（月亮已經升到地平線之上了。）
The sun has sunk below down on( below, down, on ) the horizon.
（太陽已經降到地平線之下了。）
The book is below by at( below, by, at ) $300.（這本書不到300元。）
