The boys followed the marks that they ______, until finally they found their way back to the campsite.
| A．left | B．have left |
| C．had left | D．have been left |
—Will you attend the meeting this afternoon? —But I ________ told anything about it.
| A．wasn't | B．am not | C．haven't been | D．won't be |
—Did you have any trouble with the customs officer?
—________ to speak of.
| A．No | B．Nothing | C．None | D．Neither |
Who would you rather ________ the watch?
| A．have to repair | B．have fixed | C．get repaired | D．get to repair |
Some people are good at ________ but bad at giving back.
| A．borrowing | B．taking | C．bringing | D．lending |
—How long do you think it is ________ he arrived here? —No more than half a year, I believe.
| A．when | B．that | C．before | D．since |