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②A pet ________ one of the family in the USA. A. is supposed as B. is supposed to be C. is treated to be D. is seen to ②B be supposed to be 被看做是…… 3、stay up 不睡觉， 熬夜 ◆We stayed up till after midnight to see the New Year in. 我们熬夜等着新年的到来。 ◆I stayed up last night, reading a novel from cover to cover. 我昨晚熬夜读了一整本小说。 ◆—What makes you tired now? ——什么事让你现在这么疲倦？ — Staying up for my favourite TV programme last night. ——昨晚熬夜看我最喜欢的电视节目了。 I'll be home late, but please don't ________ for me. A. stay indoors B. stay out C. stay up D. stay in C stay up 熬夜。 4、 insist on sth./(doing) sth. 坚决要，非得要(做)某事 ◆She insisted on not telling me her telephone number. 她坚持不告诉我她的电话号码。 ◆The scientist insisted on an exact figure. 这位科学家坚持要得到一个精确的数字。 insist有两个含义，其用法也不同： (1)作“坚持要；一定要”讲时，后面的从句中用虚拟语气，即“should＋动词原形”，其中should可省略。 (2)作“坚持说；坚持认为”讲时，后面的从句中不用虚拟语气。 ◆They insisted that we (should) begin the work at once. | 
