____that we should look after the three dogs three times, my mother left home.
| A．Mentioning | B．Having been mentioned |
| C．Having mentioned | D．Mentioned |
The old man has a son and two daughters, ______ treat him well, _______ made him very sad.
| A．and none of whom; as | B．neither of them; which |
| C．and none of whom; what | D．none of whom; which |
As they ______ their way through the desert the sun beat down upon them with more fierceness.
| A．went | B．took | C．came | D．made |
The children had only _______ slight temperature, but the doctor regarded the illness as serious enough for ________ hospital treatment.
| A．a; 不填 | B．不填; the | C．a; the | D．不填; a |
— Can I help myself to something to eat?
— Of course, you are ______ to, you are our guest.
| A．required | B．requested | C．hoped | D．expected |
People who have studied ancient instruments are hoping to learn more about the culture that ______ this ancient flute.
| A．produce | B．produced | C．is producing | D．was produced |