The number of people invited __________ fifty, but a number of them __________ absent for different reasons.

［　　］

Seeing the sun _______ above the surface of the sea, we let out a shout of joy.

［　　］

The workers are ____________ for their quick work.

Which of the following is not RIGHT?

［　　］

________ is known, the animals in the zoo are well fed.

［　　］

There are __________ of students in our school who will go to Shenzhen for the summer camping. _________of the students ___________ about 300.

［　　］

A．a great number,The number,is

B．the number,A number,are

C．numbers,The numbers,is

D．a number,a number

The doctor _____________ is leaving for Africa next month.

［　　］

Mike's car has a flat tire. ___________ now is to walk to the nearest pay phone.

［　　］

__________ were sent to hospital and ___________ were buried.

［　　］

____ is known that thousands of Chinese worked in the gold mines _______ the late 19th century.

[　　]

A board ____ by the side of the well on which these words ____ “Don't forget the digger when you fetch water from the well.”

[　　]

A．set up; wrote

B．put up; wrote

C．was put up; is written

D．was set up; were written