题目内容

I have never met the professor though I have been in correspondence _____ him for several years.

A) with
B) by
C) of
D) to

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________ they must learn in a course is not provided in the classroom.

A) Many things
B) So much
C) Much of what
D) All what

Of the immigrants who came to America in the first three quarters of the seventeenth century, the ________ majority was English.

A) overwhelming
B) overflowing
C) overtaking
D) overloading

You can’t be ________ careful in making the decision as it is such a critical case.

A) quite
B) too
C) very
D) so

By the first decade of the 21st century, international commercial air traffic is expected ________ vastly beyond today’s levels.

A) to have extended
B) to be extending
C) being extended
D) having been extended