It was some time _____ I realised the fact that life had become difficult for many villages in western Europe.
| A．until | B．before | C．unless | D．since |
He was told that it would be at least three more months ______ he could recover and return to work.
| A．when | B．before | C．since | D．that |
To their surprise, they found the lecture given by the famous professor easy ______.
| A．to be understood | B．to understand | C．understanding | D．understood |
It was the first time ________ I ________ face to face with a thunder storm.
| A．when / had come | B．that / have come | C．when / came | D．that / had come |
Hurry up! The train______. You know it______ at 8:30 am.
| A．leaves; leaves | B．is leaving; leaves | C．leaves; is leaving | D．is leaving; is leaving |
He spoke about the country as if he had been there, but ________ he had never.
| A．frequently | B．gradually | C．actually | D．finally |