Bird flu , a contagious disease of animals , is believed ____ by viruses that normally infect only birds and less commonly pigs , and rarely humans .
A.caused | B.being caused | C.to be caused | D.to have caused |
27.—It’s cloudy outside. Please take an umbrella.
—__________.
A.Yes, take it easy | B.Well, it just depends. |
C.Ok, just in case | D.All right, you’re welcome |
26. There was no doubt ____ it was in the supermarket _____ I lost my wallet yesterday.
A.whether, whether | B.that, that | C.that, whether | D.whether, that |
25. Time _____, I will go there with you.
A.permits | B.permitted | C.will permit | D.Permitting |
24. _____ any biscuits that morning, we had nothing to eat.
A.Not baking | B.Not having baked |
C.Not being baked | D.Not having been baked |
23.— It’s a long time _____ I saw you last.
— Yes, and what a pity! It will be a long time ____ we see each other again.
A.before, since | B.since, before | C.when, when | D.since, when |