It took several hundred years ______ paper-making spread to western countries.
| A．when | B．before | C．after | D．since |
— Will you go to the party?
— Of course I will _____.
| A．if invited | B．if having invited |
| C．if I was invited | D．if I will be invited |
— I should have gone to the wonderful concert with you yesterday.
— _____. If possible, I wish I would have another such chance.
| A．Yes, you should | B．Take it easy |
| C．What a shame | D．Don’t worry |
Thank you for________the trouble _________me with the work.
| A．having; helping | B．taking; helping |
| C．taking; to help | D．having; to help |
___________ a fine day, Shenzhou VI will be launched on time according to its planned time.
| A．Being | B．It being | C．To be | D．It is |
— What is that building?
— _____ the garden equipment is stored.
| A．There is in which | B．That is where |
| C．The building that | D．That I got |