【题目】I can lend my bike to you ___________ you promise to take good care of it.
A. while B. if C. although D. unless
【答案】B
【解析】
句意:如果你答应我好好照顾它,我可以把自行车借给你。
根据I can lend my bike to you和 you promise to take good care of it.之间的关系,可知是条件,如果你答应我好好照顾它,while当……的时候,然而;if假如,如果;although尽管,虽然;unless除非,如果不,相当于if not,除非……否则。结合句意可知选B。