In communication, a smile is usually _____ strong sign of a friendly and _____ open attitude.
| A．the; / | B．a; an | C．a; / | D．the; an |
34. ________ is often the case, we have worked out the production plan.
| A．Which | B．When | C．What | D．As |
33. A man is being questioned in relation to the ________ murder last night.
| A．advised | B．attended | C．attempted | D．Admitted |
32. It's ten years since the scientist _______on his life's work of discovering the valuable chemical.
| A．made for | B．set out | C．took off | D．turned up |
31. -- You haven't lost the ticket, have you?
-- _________. I know it's not easy to get another one at the moment.
| A．I hope not | B．Yes, I have | C．I hope so | D．Yes, I’m afraid so |
30. He got to the station early,____________ missing his train.
| A．in case of | B．in honour of | C．for fear of | D．in search of |