—Hi，Peter. Long time no see.
—Oh，it’s you，Jack. I’m sorry I didn’t ________ you at first.
| A．know | B．recognize | C．remember | D．realize |
Whoever has __________ sense knows that smoking is harmful to people's health.
| A．normal | B．general |
| C．ordinary | D．common |
We all know that a good sleeping bag is a necessary part of every camper's __________.
| A．experiment | B．entertainment |
| C．equipment | D．settlement |
His work was __________ by his boss.
| A．high thought | B．high thought of |
| C．good thought | D．well thought of |
The population of this city, forty percent of which __________, __________ 15% in the last three years.
| A．are Germans; has risen by |
| B．are Germen; has fallen by |
| C．is Germans; have increased to |
| D．is Germans; has been reduced by |
A good teacher should encourage his students to __________ the knowledge by themselves instead of just copying and memorizing what the teacher said in class.
| A．expand | B．observe |
| C．digest | D．react |