All the students at school are required to ____ lectures by the experts on howto save themselves when accidents occur, such as fires, a gas leak and so on.
| A．join in | B．take part in | C．attend | D．participate in |
At this time tomorrow ______ over the Atlantic.
| A．we’re going to fly | B．we’ll fly |
| C．we’ll be flying | D．we’re to fly |
—That must have been a lot of work.
—Yeah, it us three days to finish it.
| A．takes | B．had taken | C．took | D．was taking |
______ many times, he finally understood it.
| A．Told | B．Telling | C．Having told | D．Having been told |
Going on a trip into ______ space must be quite ______ exciting experience.
| A．/ ; the | B．/ ; an | C．the; an | D．the; a |
_______ made the school proud was______ more than 90% of the students had
been admitted to key universities.
| A．What; because | B．What; that | C．That; what | D．That; because |