Last month the Smiths paid a visit___Paris.

By the end of last month Professor Smith ____two papers.

A.had written

B.had been written

C.wrote

D.be write

—When will you be free this month, Mr. Smith？ (), maybe we'll be free next Sunday.

A. Let me be

B. Let me see

C. I'm afraid

D. Think it over

A.is

B.are

C.was

D.were

The tall building (complete) ______ last month is our new classroom building.

A.incident

B.accident

C.affair

D.event

Charles Smith， ______ was my former teacher， retired last year.

A. which

B. who

C. that

D. as

A.outrage

B.outburst

C.breaking

D.flight

A.has been

B.was

C.had been

D.will have been