unit 4 第三课时
ⅰ.语法填空
1．(2014•安徽，35改编)—i get at least half an hour of exercise almost every day.
—oh great! keep________up.
答案：it 考查情景对话。句意：——我每天至少要锻炼半个小时。——哦，好极了！坚持下去。keep it up坚持下去。
2．since the house price in the city may be ________ high as we can't imagine, i suggest that we rent an apartment to live in first.
答案：as 考查原级比较。句意：这个城市的房价既然高到我们很难想像的那样，我建议我们先租套公寓住着。
3．please keep your word now that you ________(promise) to come.
答案：have promised 句意：既然你答应了要来，你就要守约。now that既然，引导原因状语从句，由句意可知用现在完成时。
4．after fighting with his illness many years, the patient pulled ______ finally.
答案：though 句意：经过很多年与疾病作斗争之后，这个病人最终康复了。pull out抽出，取出；pull through康复。
5．—i'm thinking of the tomorrow's test. i'm afraid i can't pass this time.
—cheer________！ i'm sure you'll make it.
答案：up 考查短语用法。答句句意：——振作起来！我相信你会成功的。cheer up变得高兴，(使)振奋起来，用来鼓励对方。
6．as soon as the fire broke________， it spread quickly.
答案：out 考查动词词组辨析。句意：火灾一发生就迅速蔓延开来。break out指“(战争、火灾、疾病等的)突然发生”。
7．all the visitors were told to watch________ for those dangerous animals while visiting the zoo.
答案：out 句意：在参观动物园时，所有游客都被告知当心那些危险的动物。watch out注意，当心，与介词for连用。
8．in order to block ________ the sunshine, the students had many books piled high.
答案：out 句意：为了挡住阳光，学生们让很多书高高地堆着。block up塞住；block out挡住(光线)；break out(战争、火灾、疾病等的)突然发生；break up解散，分手。
ⅱ.完成句子
1．在爆炸发生之后，警方封锁了那条路。
the police __________________ after the explosion.
2．去年他的家乡发生了一场洪水。
a big flood ____________ in his hometown last year.
3．既然你已犯了错，就应该受到惩罚。
