They were surprised that a child should work out the problem ________ they themselves couldn't.
| A．once | B．then | C．While | D．if |
Berners-lee made ____possible for everyone to use the Internet.
| A．that | B．this | C．it | D．what |
They’ve _______ a lot of high-rise buildings recently.
| A．put up | B．give up | C．pick up | D．stand up |
Would you like _____me?
| A．to join | B．taking | C．join | D．joining |
---You forgot your pen when you went to have an exam.
---My God, ____.
| A．so did I | B．so I did | C．I did so | D．I so did |
Look at the timetable. Hurry up!! Flight 4026 _____ off at 18:20.
| A．takes | B．took | C．will be taken | D．has taken |