Great as Newton was, many of his ideas_____today and are being modified by the work of scientists of our time.
| A．are to challenge | B．have challenged |
| C．are challenging | D．have been challenged |
---- It’s burning hot today, isn’t it? ---- Yes. ________ yesterday.
| A．So was it | B．So it was | C．So it is | D．So is it |
Anxiously, she took the dress out of the package and tried it on, only ________ it didn’t fit.
| A．finding | B．found | C．to find | D．having found |
________ late in the morning, Bob turned off the alarm.
| A．To sleep | B．Sleeping | C．Sleep | D．Having slept |
We’re having a meeting in half an hour. The discussion ________ at the meeting will influence the future of our company.
| A．to be made | B．being made | C．made | D．having been made |
Let those in need ________ that we will go all out to help them.
| A．to understand | B．understand |
| C．understanding | D．understood |