Please call me back__________you see this message.

A.as soon as
B.as early as
C.as far as
D.as well as

【答案】:A

as soon as意为“一……就……”,代入句中,意为“看到这条信息时请尽快给我回电话”。as early as意为“早在,就”;as far as意为“直到……为止,只要”;as well as意为“也,又”,均不符合题意。
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