( )是指缔约一方为了保证合同的履行，在订立合同前向对方给付一定数额的货币的担保形式。
A．定金
B．留置
C．抵押．
D．质押
参考答案：A
用所给单词的正确形式填空，使句子意思完整。
小题1:It isn't easy _________(become) good English speakers.
小题1:
小题2:On the __________(three) floor, there is a drugstore.
小题2:
小题3:There are some ___________(different) in every country.
小题3:
小题4:When we heard the funny story, we couldn't stop __________(laugh).
小题4:
小题5:We should speak to our teacher __________(polite).
小题5:
首先创立现代临终关怀事业的国家是（）
A.美国
B.澳大利亚
C.英国
D.法国
E.荷兰
