—What do you think of modern music?
—It is often considered not as good as ________ of the past.
| A．it | B．that |
| C．this | D．one |
—— Alice came back home the day before yesterday.
—— Really ? Where ＿＿＿＿＿ ?
| A．has she been | B．had she been | C．has she gone | D．had she gone |
—— I will come to attend your lecture at 10：00 tomorrow.
—— I’m sorry, by then my lecture will have ended and I＿＿＿my guests in my office.
| A．is being met | B．will meet | C．will be meeting | D．will have met |
Do you have any idea ______ is actually going on in the classroom?
| A．that |
| B．what |
| C．as |
| D．which |
I was surprised by her words,which made me recognize ______ silly mistakes I had made.
| A．what |
| B．that |
| C．how |
| D．which |
Some researchers believe that there is no doubt ______ a cure for AIDS will be found.
| A．which |
| B．that |
| C．what |
| D．whether |