Believe it or not, weather forecasts seven days in advance are, , wrong half the time, according to a US survey.
| A．at first | B．in brief | C．on average | D．by chance |
The population of city________ larger than that of any other city in the country.
| A．is | B．are | C．has | D．have |
Nothing except some chairs _____ there.
| A．was | B．were | C．has | D．had |
Many sheep _______ eating grass by the river.
| A．is | B．are | C．is being | D．have |
At the bus stop _______ a solider and two young people on their way to the village.
| A．were | B．was | C．is | D．sits |
Such _________ the difficulties that we are now faced with.
| A．are | B．is | C．is being | D．be |