There’s no way of knowing why one man makes an important discovery another man, also intelligent, fails.
| A．since | B．if | C．as | D．while |
—Sorry, sir. I can’t answer this question.
---Well, you are supposed______ this part of history.
| A．reading | B．to be reading | C．to have read | D．having read |
.---Well, where did you spend your night that day
---At________Grand Hotel.
| A．where it is called Grand Hotel. | B．what is called Grand Hotel. |
| C．which is called Grand Hotel. | D．that it is called Grand Hotel. |
Not______ with the quality of your goods, I will certainly not advise others to buy them.
| A．to impress | B．impressing | C．being impressed | D．impressed |
Your letter will get ___ attention; they know you're expecting the answer.
| A．careful | B．common | C．instant | D．general |
There are some seemingly insignificant matters that, when _______ in time, can become bigger ones later on.
| A．not dealt with | B．not being dealt with |
| C．not to be dealt with | D．not having been dealt with |