.
Water can absorb and _______ a lot of heat without big changes in temperature.
| A．give up | B．give out | C．give away | D．give off |
—— 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 |
The old lady’s hand shook frequently.She explained to her doctor ______ this shaking had begun half a year before, and, ______ only because of this, she had been forced to give up her job.
| A．when;how |
| B．how;when |
| C．how;how |
| D．why;why |