—What's the matter with the man hanging his head there?
—Well，if you ________ know, he was caught stealing my bike.
| A．must | B．may | C．can | D．shall |
We are now living in _____ world where the Internet rules our life, so online searches have become _____ must.
| A．the, / | B．/ , a | C．a , a | D．a, the |
You can borrow my car ________ you promise not to drive too fast.
| A．unless | B．even if |
| C．in case | D．as long as |
Many people were afraid to go to swim when they remembered the scenes________ people were eaten by the big white shark.
| A．in which | B．by which | C．which | D．that |
—I visited China year.
—That interesting.
| A．should have been | B．can be |
| C．must be | D．must have been |
Don’t take ________ for granted that your parents should support you all your life.
| A．this | B．that | C．them | D．it |