It shames me to say it, but I told a lie when ________ at the meeting by my boss．

1. A.
   questioning
2. B.
   having questioned
3. C.
   questioned
4. D.
   to be questioned

The president _________ at the meeting, _________ by his secretary.

  It shames me to say it, but I told a lie when ___ at the meeting by my boss.

    A. questioning                                    B. having questioned

    C. questioned                                     D. to be questioned

The protesters _______ the meeting by singing and shouting.

A. ignored                                     B. attended                          C. upset                                D. held

The protesters (抗议者)_____the meeting by shouting and throwing stones at the window.