The medicine has begun to ___
| A．have its work | B．take its work | C．do its work | D．show its work |
—Can I pay the bill by check?
—Sorry, sir．But it is the management rules of our hotel that payment _____ be made in cash．
| A．shall | B．should | C．must | D．can |
According to the law, it is _____ get your driving license．
| A．not until you’re eighteen can you | B．until you’re eighteen that you can’t |
| C．not until you’re eighteen that you can | D．until you’re eighteen when you can’t |
Although he was in poor health, Robert succeeded_____other more famous engineers failed．
| A．which | B．that | C．what | D．where |
To her disappointment, what she had devoted herself to _______ in nothing but failure．
| A．resulting | B．results | C．has resulted | D．resulted |
“It is not only you but also Tom who _________,” said the teacher after knowing what had happened．
| A．are to be blamed | B．is to be blamed |
| C．are to blame | D．is to blame |