I regret ______ that we have no news for you.
| A．to say | B．saying | C．to have said | D．having said |
As time went on, new customs went into Christmas，and was the Christmas tree，which was started in Germany．
| A．it | B．this | C．that | D．one |
Some researchers believe that many patterns of nature are rules of their own and not affected by natural selection．
| A．making | B．breaking | C．following | D．bending |
—Can I look at the menu for a few seconds before I decide?
—Of course．，sir．
| A．Take your time | B．It doesn’t matter |
| C．Enjoy yourself | D．Help yourself |
Only whenin the afternoonable to leave.
| A．the match was over; they were | B．was the match over; were they |
| C．was the match over; they were | D．the match was over; were they |
There are 51 students in Class Three, _____ failed in the test.
| A．all of which | B．all of them | C．none of whom | D．none of them |