Though I have often heard this song _______. I have never heard you _______ it.
| A．being sung, sang | B．sang, singing | C．sung, sing | D．to be sung, to sing |
Close the door of fear behind you，and you _________ the door offaith open before you．
| A．see | B．have seen | C．will see | D．are seeing |
The next day is Thanksgiving Day,a special moment _________ we can express our gratitude, respect and love we feel all year round．
| A．which | B．when | C．where | D．／ |
Most computer users think it necessary for their software ________ regularly．
| A．to up date | B．to be updated |
| C．to have been up dated | D．to have updated |
_________ you are on holiday,you should enjoy leisure time and take your focus off your work．
| A．Now that | B．Even if | C．If only | D．As though |
By the time I left the concert，my ears_________，with complex feelings filling my heart．
| A．had rung | B．were ringing | C．were to ring | D．rang |