--- How many concerts ____ up to now?
--- About 25. Last night we ____ our biggest one.
| A．did you play, have had | B．have you played, had |
| C．had you played, have had | D．do you play, have had |
The news that Xiamen Xiang’an Tunnel, China’s first undersea tunnel, has been put into traffic excites us greatly, ______?
| A．doesn’t it | B．does it | C．do they | D．don’t they |
I need to call my friend David _____ coat I walked off by mistake yesterday.
| A．in whose | B．in that | C．with which | D．with her |
________ the two designs, and you will find what problem there is with yours.
| A．Comparing | B．Compared | C．To compare | D．Compare |
. ----I can’t find my favorite magazine.
----I saw Jack going away with ______, but I’m not sure whether it’s yours.
| A．it | B．that | C．one | D．some |
. It is still unclear ______ the little boy got the CD player to work.
| A．where | B．what | C．that | D．how |