He is eager to own an iPhone. However, from his _____ look on his face, the price of iPhones must have risen.
| A．satisfied | B．disappointing |
| C．disappointed | D．satisfying |
.The teacher used to stay up deep into the night. ______ , he made himself ill.
| A．However | B．Eventually | C．Moreover | D．Also |
.What________ pity that you couldn’t be there to receive ________ prize!
| A．a, a | B．the, a | C．the, the | D．a, the |
.Water, which seems to be so simple and common, is ______ makes life possible.
| A．that | B．which | C．what | D．where |
The number of students in this college _____ by 10% every year.
| A．rises | B．lifts | C．raises | D．arises |
.______ the beginning of the 19th century did scientists know that all matter is made up of 
atoms.
| A．At | B．By | C．Up to | D．Not until |