31. Einstein didn’t care for money. Once he used a check _____ $1000 as a bookmark and then he lost it.
| A．for | B．of | C．about | D．To |
Andy is content with the toy. It is he has ever got.
| A．a better | B．the better |
| C．a best | D．the best |
There is only one more day to go your favorite music group play live.
| A．since | B．until | C．when | D．before |
Brian is gifted in writing music; he is very likely to be Beethoven.
| A．a | B．an | C．the | D．不填 |
More expressways in Sichuan soon to promote the local economy.
| A．are being built | B．will be built |
| C．have been built | D．had been built |
The books on the desk, covers are shiny, are prizes for us.
| A．which | B．what | C．whose | D．that |