________ in a white uniform, he looks more like a cook than a doctor．

A．Dressed

B．To dress

C．Dressing

D．Having dressed

________ in the queue for half an hour, Tom suddenly realized that he had left his wallet at home．

A．To wait

B．Have waited

C．Having waited

D．To have waited

________ into use in April 2000, the hotline was meant for residents reporting water and heating supply break-downs．

A．Put

B．Putting

C．Having put

D．Being put

All these gifts must be mailed immediately ________ in time for Christmas．

A．in order to have received

B．in order to receive

C．so as to be received

D．so as to be receiving

－Is Bob still performing?

－I'm afraid not．He is said ________ the stage already as he has become an official．

A．to have left

B．to leave

C．to have been left

D．to be left

The news reporters hurried to the airport, only ________ the film stars had left．

A．to tell

B．to be told

C．telling

D．told

He glanced over at her, ________ that though she was tiny, she seemed very well put together．

A．having noted

B．noted

C．to note

D．noting

Don't sit there ________ nothing．Come and help me with this table．

A．do

B．to do

C．doing

D．and doing

It was unbelievable that the fans waited outside the gym for three hours just ________ a look at the sports stars．

A．had

B．having

C．to have

D．have

While watching television, ________．

A．the doorbell rang

B．the doorbell rings

C．we heard the doorbell ring

D．we heard the doorbell rings