— How often do you refer to a dictionary when you are reading an English novel?
— Well, it depends. ____ it actually affects my understanding ____ look the word up.
| A．Only if; will I | B．Only if; I will |
| C．Unless; will I | D．Unless; I will |
The effect a teacher has _______ children may be greater than that of their parents.
| A．in | B．on | C．at | D．with |
—Everyone in my class passed the exam.
—Oh, really? It ________ difficult.
| A．can’t have been | B．needn’t have been |
| C．must be | D．mightn’t be |
I ran across David while walking along the street yesterday. I ________ him for three years.
| A．hadn’t seen | B．didn’t see |
| C．haven’t seen | D．don’t see |
—You are required by law _______ seat belts.
—Thanks for your reminding. I’ll do it right away.
| A．wearing | B．being worn | C．to wear | D．to be worn |
______ such a heavy loss in the earthquake, they got help from all over the world.
| A．Suffer | B．Having suffered |
| C．Suffered | D．To suffer |