—Why do you look so puzzled?
—Oh，I ________ over a most difficult maths problem.
| A．thought | B．have thought |
| C．am thinking | D．think |
What shocked the police and the people around most was that the kidnapper suddenly ______his pocket and took out a gun in a desperate attempt to escape with the kidnapped child.
| A．dived into | B．slipped into | C．slid into | D．fit into |
Women and children, generally referred to as non-power group, are more likely to become _____ targets for thieves and robbers.
| A．approximate | B．primitive | C．prime | D．precise |
According to Wang Lijun, Chongqing’s former vice-mayor and police chief, Bo Xilai seemed to have been involved in helping himself _______seek personal gains in the past.
| A．anyway | B．anyhow | C．somehow | D．somewhat |
As a businessman, Mr. Green is a complete failure. Being lazy may well be one of the______to his success.
| A．drawbacks | B．shortcomings | C．disadvantages | D．barriers |
It is reported that floods and serious loss of soil and water have _______an ample amount of mud in the Yellow River, making pumping water out of it hard for farmers around.
| A．accelerated |
B．snatched |
C．deleted |
D．deposited |