Never before _________ seen anybody who can play tennis as well as Robert.
| A．had she | B．she had |
| C．has she | D．she has |
We went to town _________ some shopping.
| A．doing | B．did | C．to make | D．to do |
The funny story _______ me laugh.
| A．make | B．making | C．to make | D．made |
_____ with the accident, he was forced to resign.
| A．Concerned | B．Concerning |
| C．Having concerned | D．Be concerned |
They use computers to keep the traffic smoothly．
| A．being run | B．run | C．to run | D．Running |
All flights ________called off because of the terrible weather, they had to go there by train.
| A．were | B．having been | C．being | D．had been |