______visited the Shanghai World Expo is sure to tell you the place is worth visiting twice.
A.Those who have | B.Whoever has |
C.Those who has | D.Whoever have |
While other scientists are keeping____eye on changes in the H5N1 bird flu strain, the scientists in England are working on vaccines, in case it becomes highly infectious in ____humans.
A.a , / | B.an, / | C.the, an | D.an, the |
---John, there is ______ Mr. Wilson on the phone for you.
---I'm in ______ bath.
A.a; the | B.the; a | C.a;不填 | D.the;不填 |
The teacher, with 6 girls and 8 boys of her class, _______ visiting a museum when the earthquake struck.
A.was | B.were | C.had been | D.would be |
All the employees except the manager ______to work online at home.
A.encourages | B.encourage | C.is encouraged | D.are encouraged |
____with the size of the whole earth , the biggest ocean does not seem big at all .
A.Compare | B.When comparing | C.Comparing | D.When compared |