1.you shouldn't point at other people with your chopsticks____it is impolite.
问题描述：
1.you shouldn't point at other people with your chopsticks____it is impolite.
A.but B.although C.since
（我怎么觉得都不对应该用because啊= =.）
2.Many people____the small supermarket ,so I left without buying anything..
A.crowd B.have crowded C.crowded
3.I did not even know that my grandfather was also from Arklow_____recently.
A.after B.until C.since
答
1.since有因为的意思,不过没有because表示原因的意思那么强烈,since表示的原因显而易见,或大家都知道.2.许多人记在小超市里,所以我离开了,用一般过去时.不能用现在完成时,它强调对现在的影响,而题里面I left是一般过...