So hard-working _____ that he sets a good example to all the other classmates．
| A．he is | B．is he | C．does he | D．he does |
In the near future, more advances in cloning technology by scientists.
| A．are making | B．are made | C．will make | D．will be made |
He had collected plenty of historical evidence, proved that humans used to have different sleeping patterns.
| A．that | B．which | C．it | D．what |
I can’t see any reason to use cash anymore it’s so much easier to use other means of payment.
| A．while | B．therefore | C．although | D．since |
It has been announced that candidates remain in their seats until all the papers have been collected.
| A．shall | B．can | C．should | D．must |
Although I’m a very tolerant person, I hate when people try to push my limit.
| A．this | B．that | C．it | D．one |