Do you know where my address book is? — It________ be in the hall cupboard. I think I saw it this morning.
| A．could | B．can | C．will | D．must |
We spent many years studying the formation of rocks , experiencing many sufferings and even death. But our hard work_________in the end , and we made it.
| A．paid off | B．made up | C．gave away | D．came out |
This is a very interesting book．I’ll buy it，________．
| A．how much may it cost | B．it may cost |
| C．however much it may cost | D．how may it cost |
She is so ___ that no one can ever persuade her．
| A．reliable | B．stubborn | C．artificial | D．intelligent |
There is no decision yet ______ when the work might start．
| A．due to | B．as to | C．in addition to | D．owing to |
．The two brothers look so much ___ that we can’t___ one from the other．
| A．familiar, separate | B．familiar, tell |
| C．alike, differ | D．alike, distinguish |