—Why are your hands so dirty?
—I ____________in the garden.
| A．was working | B．have worked | C．worked | D．have been working |
Great changes _______ in his hometown in the last twenty years.
| A．were taken place | B．have taken place |
| C．have been taken place | D．took place |
--- How is the lecture going?
--- The lecture has ended. You’re ________.
| A．too much late | B．much too late |
| C．too late much | D．late too much |
An increasing number of people ________ the importance to physical exercise.
| A．attach | B．appreciate |
| C．combine | D．permit |
—Who______ it be that is knocking at the door?
—It ______ be Father, but I’m not sure.
| A．can; must | B．can; may |
| C．must; can | D．may; must |
The teacher will never have Tom away within the exam.
| A．get; cheat | B．to get; cheating |
| C．getting; cheating | D．getting; to cheat |