单项选择题

The first ______ of the bridge is one hundred meters long.

A. preface
B. span
C. block
D. phase
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Dr Johnson is head of the department, ______ an expert in translation.
A. or

B. either
C. but
D. and
单项选择题
All the land was shrouded in one ______ forest.
A. enormous
B. vast
C. gigantic
D. huge
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