Nuclear ______ be really dangerous at times even though it’s a nice energy in general．
| A．shall | B．should | C．can | D．Must |
_____ to give up smoking, he threw away his _____ cigarettes.
| A．Determined; remained | B．Determined; remaining |
| C．Determining; remained | D．Determining; remaining |
I can’t remember how many years ago _____ a fight broke out between the husband and the wife.
| A．it was when | B．was it that | C．it was that | D．was it when |
_____ surprised me most was that he made the same mistake again.
| A．It | B．That | C．What | D．Which |
Recently my father bought an ancient Chinese vase, _____ was very reasonable.
| A．which price | B．the price of which | C．its price | D．the price of whose |
I was just going to cut my rose bushes but someone _____ it. Was it you?
| A．had done | B．has done | C．would do | D．will do |