单项选择题

_________ , Shirley thought Carol's husband was ill, but later she realized he wasn't.

A．First
B．At first
C．Firstly
D．First of all
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单项选择题
The building casts a large _________ on the ground.
A．shadow
B．shade
C．shampoo
D．shawl
单项选择题
We can assign the task to _________ is capable and trust worthy.
A．whomever
B．who
C．whom
D．whoever
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