The camera________in 1827 by Joseph Nicephore Niepce．
A．invented
B．is invented
C．was invented
D．is inventing
The Olympic Games of 2016 will________in Brazil．
A．take after
B．take off
C．take place
D．take away
Mum added lots of________on the food but it still wasn’t________．
A．salt；enough salt
B．salt；salty enough
C．salty；enough salt
D．salty；salt enough
—What kind of potato chips do you like？
—I like________ones because they are hard，dry and easily broken．
A．crispy
B．sweet
C．soft
D．sour
The number of teachers in our school________60 and a number of them________male teachers．
A．is；are
B．are；is
C．are；are
D．is；is
They are made________14 hours a day．
A．work
B．to work
C．worked
D．working
