Ninety-six point five percent of the water on the earth ______ sea water.
| A．are | B．is | C．was | D．were |
Every possible means_____ been tried，and we find only______ this means can we do it well．
| A．have，in | B．have，by |
| C．has，in | D．has，by |
More than one student ___ that experiment.
| A．has finished | B．have finished | C．are finishing | D．were finishing |
The teacher together with his students ___ down at the desk and having a discussion in the classroom.
| A．is sitting | B．sat | C．are sitting | D．would sit |
The poster says that a writer and poet ___ to give us a talk on English next week.
| A．is | B．are | C．be | D．will be |
The poster says that a writer and poet ___ to give us a talk on English next week.
| A．is | B．are | C．be | D．will be |
The teacher said that either you or I __ to attend the lecture.
| A．was | B．were | C．be | D．should be |
The population of China ___ over one thousand million.
| A．is | B．are | C．has | D．have |
—____ the police known about the incident?
—Yes. _____ informed immediately.
| A．Has;They were | B．Have;They were |
| C．Has;It was | D．Have;It was |
Peter, together with his parents_________every Sunday.
| A．went hiking | B．go hiking | C．goes hiking | D．hiking |
—Each of the students, working hard at his or her lessons, _________to go to university.
—So do I.
| A．hope | B．hopes | C．hoping | D．hoped |
The number of people invited __________ fifty, but a number of them __________ absent for different reasons.
| A． were ; was | B．was ; was | C．was ; were | D．were ; were |
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 |
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