A successful scientist needs _____ if he wants to make hypothesis (假设) of how processes work and how events take place.
He is famous both _________a novelist and poet but he is more famous_________ his novels.
Niagara Fall is a great tourist ________, drawing millions of visitors every year.
You have _____ me. I didn’t refer to anyone here when I mentioned that at the meeting. What I wanted to say was that such a mistake could have been avoided.
Early American settlers were great_____ -- they could build almost anything from wood.
– Do you know _____ yesterday? – It was at 8 o’clock in the morning.