George has arrived, but I did not know he ______ until yesterday.
| A．comes | B．will come | C．is coming | D．was coming |
The number of pages in this dictionary ________ about two thousand.
| A．are | B．has | C．have | D．is |
Now Tom with his classmates ________ football on the playground.
| A．play | B．are playing | C．plays | D．is playing |
Half of the workers here ________ under 30 ________.
| A．is;years | B．are;year old | C．is;years old | D．are;years of age |
About 60 percent of the students ________ from the south,the rest of them ________ from the north and foreign countries.
| A．are;is | B．are;are | C．is;are | D．is;is |
He looked quite healthy though he was _________.
| A．in seventy | B．in his seventy |
| C．at seventies | D．at the age of seventy |