4．Steven Spielberg's films are most successful because ．

　　A．he likes to use sharks and dinosaurs as the materials for films

　　B．he knows how to entertain audience best

　　C．there is not a mistake in his films

　　D．he is best at directing films

　　【答案】　1－4　CCAB

　　 occasionally adv.有时，偶尔

　　(教材P54)It has occasionally been done.

　　此事是偶然发生的。

　　(1)occasional adj. 偶然的，临时的

　　(2)occasion n. 场合，时机

　　on...occasion 在......的场合

　　①Mrs. Smith listened carefully, occasionally breaking in with a few questions.

　　史密斯夫人认真地听着，偶尔打断一下问几个问题。

　　②She went to college last summer, so we saw each other very (occasional)．

　　去年夏天，她去上大学了，因此我们极少见面。

　　③Tom wrote a poem to his wife on the (occasional) of her birthday.

　　汤姆在妻子生日时给她写了一首诗。

　　【答案】　②occasionally　③occasion

　　 entertaining adj.有趣的，使人愉快的

　　(教材P55)Do you agree or disagree that advertisements are entertaining?

　　你同意还是反对广告很有趣(这一观点)?

(1)entertain vt. 娱乐，使快乐；招待，款待