— Will you see to _____ that all the papers should be handed in after class?
— All right.
[     ]
A. this
B. it
C. me
D. them
Recently I received a letter from him, and _____ was a big surprise for me.
[      ]

A. that
B. which
C. it
D. who

We have reminded him again and again, but ______ turned to be of no use.
[     ]
A. which
B. that
C. it
D. what
Europeans made ______ clear that they did not want to take the Roma as neighbors.
[     ]
A. so
B. very
C. it
D. that
Do you think _____ possible to master a foreign language without any memory work?
[     ]
A. it
B. this
C. that
D. how
The chairman thought _____ necessary to invite Professor Smith to speak at the meeting.

[     ]

A. that
B. it
C. this
D. him
The doctor advised Vera strongly that she should take a holiday, but _____ didn't help.

[     ]

A. it
B. she
C. which
D. he
They are good friends. _____ is no wonder that they know each other so well.

[     ]

A. This
B. That
C. There
D. It

I like _____ in the autumn when the weather is clear and bright.

[     ]

A. this
B. that
C. it
D. one

_____ seemed that he _____ read the book before.

[     ]

A. He; has
B. It; had
C. Things; has
D. That; had
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