The scientist wrote down_____ series of things to do with______ nature, such as a blue sky.A a, / B. a, the C. /, / D. /, the
Tom _________ in the library every night over the last three months.
Although cats can not see in complete darkness, their eyes are much more _______to light than human eyes.
There’re more than 100 elements found in nature, ______ are metals.
— Tony,you look upset. What’s the matter? — I had my proposal _______ again.
______ Father offers to us children is honesty and kindness.