1．—I probably shouldn't have any more cake.
—Oh, ________.It won't kill you.
A．go ahead B．hold on, please
C．you're welcome D．that'll do
解析：选A 句意：“我或许不应该再吃蛋糕了。”“噢，吃吧。吃点儿蛋糕对你来说算不了什么。”根据句意，此处是鼓励对方吃点儿蛋糕，所以选go ahead“吃吧；做吧；说吧”。
2．(2015·浙江高考)Most of us, if we know even a little about where our food comes from, understand that every bite put into our mouths was________ alive.
A．steadily B．instantly
C．formerly D．permanently
解析：选C 考查副词。句意：我们大多数人，如果对食物来源多少知道一点点的话，就会懂得吃的每一口食物先前(formerly)都是有生命的。steadily“稳定地”；instantly“立即，马上”；permanently“永久地，长久地”。
3．(2019·无锡模拟)In less than 4 decades, we'll live longer and have children in old age. This shift is so significant that it is ________ to the change from monkeys to humans.
A．considerable B．comparable
C．predictable D．irresistible
解析：选B 根据题干中的“This shift is so significant(这个改变是非常重要的)”可知，这个改变可以与“猴子变成人”相比较。comparable“可比较的，比得上的”。
4．I called Hannah many times yesterday evening, but I couldn't get through. Her brother ________ on the phone all the time!
A．was talking B．has been talking
C．has talked D．talked
解析：选A 句意：我昨晚多次给汉娜打电话，但就是打不通，她哥哥一直占用着电话。从句中的all the time可以看出，句子强调的是“一直不断地”进行且动作发生在过去，故用过去进行时。
5．—Where did you find the professor who made the speech yesterday?
—It was in the hall ________ the students often have a meeting.
A．where B．which
C．that D．when
解析：选A 完整的答句为强调句式，强调地点状语in the hall，后面省略了that I found the professor。“________ the students often have a meeting”为定语从句，where引导定语从句，指代先行词the hall。
