单项选择题

Many things ______ impossible in the past are quite common nowadays.

A．having considered
B．considered
C．to be considered
D．considering
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单项选择题
Carl is starting college in September. ______ , he is traveling around Europe.
A．Meanwhile
B．Although
C．As a result
D．After all
单项选择题
Eliza remembers everything exactly as if it ______ yesterday.
A．was happening
B．happens
C．has happened
D．happened
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