drop in(at sp.) 顺便参观(某地方)

　　drop in(on sb.) 顺便走访(某人)

　　drop behind/back 落后；掉队

　　drop by 顺便拜访

　　⑥He had to drop out of the race because of injury.

　　他由于受伤不得不退出比赛。

　　⑦Sales have dropped ________ in recent months.

　　近几个月来，销售额有所下降。

　　⑧He dropped ________ my office this morning.

　　今天早晨他到我办公室串门来了。

　　【答案】　⑦away　⑧by

　　 as a result of...由于......的原因

　　(教材P26)Recently there has been another burst of interest in space as a result of the Hubble Telescope.

　　最近，由于哈勃望远镜的发明，人们对探索太空的兴趣进入了另一个高潮。

　　(1)without result　　　　 毫无结果，徒劳

　　with the result that 为此，因此

　　as a result 结果，因此

　　(2)result from 因为，源于

　　result in 结果为，终归，导致

　　①We helped each other in studies and as a result we became good friends.

　　我们在学习上互相帮助，结果我们成了好朋友。

　　②His carelessness resulted ________ his failure in this examination.

　　他的粗心导致他这次考试的失败。

　　③This traffic accident resulted completely ________ your drunkdriving.

　　这次交通事故完全是由于你醉驾造成的。

【答案】　②in　③from