一Mary，you look confused．Have you made sense of the passage we are talking
about?
一Yes，I another problem just now.
| A．have thought of | B．was thinking of | C．thought of | D．had thought of |
So much of interest ___ that most visitors simply run out of time before seeing it all.
| A．offers Beijing | B．Beijing offers |
| C．does Beijing offer | D．Beijing does offer |
Not until the motorbike looked almost new _________ repairing and cleaning it.
| A．he stopped | B．did he stop | C．stopped he | D．he did stop |
Bill wasn’t happy about the delay of the report by Jason, and ______.
| A．I was neither | B．neither was I | C．I was either | D．either was I |
It was announced that only when the fire was under control ___ to return to their homes.
| A．the residents would be permitted | B．had the residents been permitted |
| C．would be residents be permitted | D．the residents had been permitted |
______ you eat the correct foods ______ be able to keep fit and stay healthy.
| A．only if; will you | B．Only if; you will |
| C．Unless; will you | D．Unless; you will |