Most animals have little connection with animals of a different kind, _______ they hunt them for food.
| A．if | B．while | C．unless | D．as |
—I’m ______the suggestion. How about you?
—Hard to say. I'll have to think it over.
| A．in memory of | B．in demand of | C．in favor of | D．in terms of |
______ sweet and good, the birthday cake was soon eaten up by those children.
| A．To taste | B．Tasting | C．Tasted | D．Having tasted |
Mother wanted to be a good provider, a role she ______ since her marriage to Father.
| A．shoulders | B．shouldered |
| C．is shouldering | D．has been shouldering |
It will make ______big difference if this experiment becomes ______ success.
| A．a; a | B．a; the | C．/; / | D．a; / |
By the time my mother came back from work, my sister and I ________ supper and were waiting for her at the table.
| A．have cooked | B．were cooking | C．had cooked | D．would cook |