While he in Europe, he some photographs of many universities.
| A．traveled ;took | B． traveled ;had | C．was traveling ;put | D．was traveling ;took |
. Many people complain of the rapid _____ of modern life.
| A．rate | B．pace | C．speed | D．growth |
. The government is _____ and will take the necessary steps to maintain security and stability.
| A．on the alert | B．out of control |
| C．on guard | D．in vain |
Carl wanted to play a joke on Bob but gave himself _____ by laughing.
| A．away | B．in | C．out | D．up |
The rapidly growing birth rate brings about a lot of environment problems, which the government is supposed to take _____.
| A．significantly | B．severely | C．earnestly | D．seriously |
The two dogs started to fight, so we tried to _____ them.
| A．split | B．separate | C．tear | D．divide |