Residents ________ not to go out alone or to take part in any groups during the period of recent terrorist activities. 
| A．were always being warned | B．are always warning |
| C．always warned | D．had always been warned |
According to an old story, Leif followed Biarni’s directions and sailed to _______ is believed to be the coast of present-day Canada.
| A．where | B．which | C．what | D．that |
While he was at college，he took part in political activities，and was thrown into prison．
| A．the；/ | B．/；the | C．／；／ | D．the；the |
Great changes have taken place in China since the People’s Republic of China
in 1949．
| A．was found | B．founded | C．was founded | D．found |
At night we can see stars in the universe．
| A．millions of | B．million of | C．millions | D．million |
The Olympic Games，in 776 B．C．，did not include women players until 1912．
A．first playing B．to be first played
C．first played D．to be first playing