The reason _____ their failure you know is ______ they didn’t get fully prepared for the experiment.
| A．why…that | B．that…why |
| C．why…because | D．for…that |
Shall we go ____ downtown to buy some clothes of high quality?
| A．to | B．the |
| C．不填 | D．to a |
____ we are alone, we can speak freely.
| A．Now that | B．Though |
| C．Even if | D．As if |
The chairman thought ____ necessary to invite Professor Smith to speak at the meeting.
| A．that | B．it |
| C．this | D．him |
It is not expected ____ he said caused so much discussion at the meeting.
| A．that | B．what that |
| C．what | D．that what |
He is always ready to help others. That’s one of his _____.
| A．strengths | B．powers |
| C．abilities | D．benefits |