The building project ______ next year is, I think, not easy ______ in time.

A. being carried out; to complete    B. carried out; to be completed

C. to be carried out; to complete     D. to be carried out; to be completed

As early as 1647 Ohio made a decision that free, tax-supported schools must be set up in every town ______ 50 households or more.

A. having          B. to have    C. to have had          D. having had

 He spoke in such a high voice ______ out in the street.

A. as to be heard     B. to be heard     C. as to hear        D. to hear

 He wondered if he could slip out of the lecture hall without anyone ______.

A. noticing        B. noticed     C. to notice     D. being noticed

I regret ______ you that they are unable to come to your wedding tomorrow.

A. informing  B. having informed  C. to have been informed    D. to inform

----Will you please tell us how you can seize the robbers?

----I will spend a whole week ______ in your room to wait for their coming.

A. locking         B. to lock   C. locked          D. being locked

Which will you enjoy ______ your vacation, traveling abroad or working in the countryside?

A. to spend        B. spend      C. spending        D. spent

 Tom looked at Jenny, tears ______ his eyes, and shouted out the words ______ in his heart for years.

A. filling; having hidden   B. filled; hidden  C. filling; hidden  D. filled; hiding

China became the 143rd member of the World Trade Organization on December 11, 2001, thus ______ its 15-year wish to join the global trade body.

A. having realized     B. realized     C. realizing        D. to realize

______ to nuclear radiation, even for a short time, may produce variants(变异体) of genes in human bodies.

A. Being exposed    B. Having exposed  C. Exposed  D. After being exposed