Some English scientists are identifying problems ____ technology in the 21st century. If solved, the solutions could change the world.
| A．facing | B．faced | C．being faced | D．having faced |
The teacher __________ the work as their homework on the point of ending class.
| A．assigned | B．realized |
| C．stretched | D．billowed |
They delayed __________ the sports meeting until next month.
| A．to hold | B．hold |
| C．holding | D．held |
__________ I suggest, he always disagrees.
| A．However | B．Whatever |
| C．Whichever | D．Whoever |
—Hey! Lucy! Have you heard about the optional courses this year?
— __________. What about that?
| A．Not really | B．Not exactly |
| C．Not simply | D．Not nearly |
We all know the truth __________ he is telling a lie.
| A．what | B．which | C．that | D．where |