在大学时，贝拉克·奥巴马不知道他会成为美国第一任黑人总统。

　　[名师指津]　(1)be about to do ...表示“即将发生的动作”，不与表示时间的副词或其他时间状语连用，常用于be about to do ... when ...，意为“正要做……这时……”。

　　(2)be going to do ...多用于口语，强调事先打算、计划要做某事或根据某种迹象要发生某事。

　　Ⅰ.基础点全练

　　1．单句语法填空

　　①I could hear the bird whistling at the edge of the woods.

　　②The house still needed a lot of work, but at least the kitchen was finished.

　　③The orange trees are heavy with fruits this year because of the fine weather.

　　④Some tourists complained of being ripped off by local cab drivers.

　　⑤After the examination, the teacher will have four weeks off.

　　⑥The sound of the cheering was dying away in the distance.

　　⑦Many people attended the meeting, most of them scientists.

　　⑧I'd like to take advantage of this opportunity to express my thanks for your help.

　　2．运用所学短语完成片段

　　To Tom's great joy, he will ①have_four_weeks_off (休四周假) next month. He is so happy that he even feels the air ②is_heavy_with (充满) smells of happiness. He decides to ③take_advantage_of (利用) the vacation to go on a trip. Although in some places he may sometimes ④be_ripped_off (被敲诈) by the local people, he can still ⑤get_a_kick_out_of (从……中得到乐趣) it. Because the trip will ⑥at_least (至少) provide him a chance to be close to nature.

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