-Would you like to help me clean the lab at 4 o'clock this afternoon?
-I would like to, but I __________ listening practice then.
| A．will do |
| B．have been doing |
| C．am doing |
| D．will be doing |
They __________on the program for almost one week before I joined them, and now we ________on it as no good results have come out so far.
| A．had been working; are still working |
| B．had worked; were still working |
| C．have been working; have worked |
| D．have worked; are still working |
He was a bit nervous. He _________his spare breath with a soft sound that was almost heard by the audience.
| A．gave out | B．let out | C．picked out | D．blew out. |
Not until he went through real hardship ________the love we have for our families is important.
| A．had he realized | B．did he realize | C．he realized | D．he had realized |
Measures have been taken to fight ________recurring food safety problems, but there is still a long way to go before China can rid itself ________ these issues.
| A．for; of | B．for; from | C．against; of | D．against; from |
“Only two centimeters higher, _______break the world record,” encouraged the coach.
| A．you will | B．and you will | C．or you will | D．will you |