He failed the mid-term examination and only then________how much time he had wasted.
| A．he realized | B．did he realize |
| C．he had realized | D．had he realized |
The judge made the final decision after listening to the opinions of each party ______.
| A．having involved | B．to be involved |
| C．involving | D．involved |
The athletes, especially the winners, should remain modest ____ rapid progress they’ve made.
| A．however | B．how much | C．whatever | D．no matter |
He was disappointed ____ he had learned from books quite differed from his actual life.
| A．what | B．that | C．which | D．how |
Our community appears more beautiful with green grass and colorful flowers ____ here and there.
| A．grow | B．to grow | C．growing | D．having grown |
They chatted ____ coffee about their experience as volunteers during the charity.
| A．over | B．on | C．to | D．with |