Which person do you refer to, the one with ______ long hair or the one with _______ long beard?
| A．a, a | B．不填，不填 | C．a, 不填 | D．不填，a |
32. Staying in a different country, just watch others to see _____ they act to decide what the best to say is.
| A．What | B．Why | C．how | D．When |
31. The cheering went on for quite some time _____ it died down and people took their seats again.
| A．Before | B．Since | C．As | D．When |
30. —I _________ his telephone number.
—I have his number, but I _________ to bring my phone book.”
| A．forget, forget | B．forgot, forgot | C．forgot, forget | D．forget, forgot |
29. He was busy preparing a speech , only _______ once in a while to rise from the table for a tea .
| A．stopping | B．to stop | C．to have stopped | D．having stopped |
28. Mr. Duncan raised an unnecessary question _______ he then failed to find an answer.
| A．with which | B．for which | C．to which | D．by which |