四、it类
. Everyone knows that _______ is dangerous to play with fire, but _______ is difficult is to prevent children from playing with fire.
| A．it, it | B．what, what | C．it, what | D．what, it |
— Where is your mother?
—She ________ the shop. She’ll be back in an hour.
| A．has been to | B．has gone to | C．goes to | D．go to |
—Do you know Peng Li yuan?
—Of course, she is First Lady of China, famous singer.
| A．a, a | B．the, a | C．the, the | D．a, the |
If only I ________ driving before.
| A．learn | B．learned | C．had learned | D．would learn |
It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any ________.
| A．shadow | B．similarity | C．sample | D．symptom |
He is opposed to such a view that it is his intelligence and good luck that have ________ his success.
| A．contributed in | B．led to | C．come out | D．resulted from |