—John has put forward _______ most challenging question for us to answer.
—Yes, it really is. I have never heard _______ harder one.
| A．the; 不填 | B．不填; the | C．the; the | D．a; a |
______, but he couldn’t understand the logical connection of the two subjects.
| A．Having told many times |
| B．Having been told many times |
| C．He had been told many times |
| D．Many times as he was told |
He met a lot of his friends at the party, ______devoted to rural education like him.
| A．many of them |
| B．many of who |
| C．many of whom |
| D．many of which |
The number of people invited ______ fifty, but a number of them ______absent for different reasons
| A．were;was |
| B．was;was |
| C．was;were |
| D．were;were |
—Excuse me, would you lower your voice or use your mobile phone outside?
—Oh, sorry.I_______
| A．didn’t realize | B．don’t realize |
| C．haven’t realized | D．hadn’t realize |
In addition to his traditional medical treatment, he tried to put himself in situations______ would bring about positive emotions.
| A．which |
| B．where |
| C．why |
| D．as |