The oil must have been used up, _____ the light went out.
| A．for | B．because | C．since | D．as |
—He found a baby in his car when he came back from the supermarket. And ___ was crying for some milk.
—When was _____?
—_____ was in 2000 when he was still in college.
| A．it; that; This | B．he; this; It | C．she; it; This | D．it; that; It |
— Could you give _______ an introduction to the new machine?
— Of course. I will tell you how to use it.
| A．him | B．us | C．her | D．it |
Normally, a forest fire and the damage ______ causes can be very severe, especially when you consider the financial and physical losses.
| A．which | B．it | C．this | D．that |
This kind of cell phone is very common and I also have ______.
| A．one | B．it | C．that | D．another |
The case of Li Gang became a hot topic and so did ______of Li Tianyi.
| A．it | B．one | C．that | D．this |