【单选题】【消耗次数：1】
The travellers have suffered many hardships and ____________ many difficulties.
①
undergo
②
undergoes
③
undergone
④
underwent
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相关题目
【单选题】
Though faced with many difficulties, he would not _______ online learning.
①
give up
②
get through
③
get by
④
give in
【单选题】
Doctors have said that as many as 50% of patients dont take medicine ______.
①
like directed
②
to be directed
③
as directed
④
so that directed
【单选题】
Doctors have said that as many as 50% of patients dont take medicine ______.
①
like directed
②
to be directed
③
as directed
④
so that directed
【单选题】
The lives of many people have been enriched_________ adult education.
①
because
②
because of
③
as a result
④
so that
【多选题】
The lives of many people have been enriched_________ adult education.
①
because
②
because of
③
due to
④
owing to
随机题目
【单选题】
设格中元素a,b,c,d，若a ≤ b和c ≤ d，下面哪个性质不满足：
①
a*c ≤ b*d；
②
a?c ≤ b?d；
③
a*c ≤ b?d；
④
a?c ≤ b*d。
【多选题】
集合S = {1, 2, … , 10}上定义的运算x*y=质数 p 的个数, 其中 x≤p≤y，下面说法不正确的是：
①
不封闭；
②
可结合；
③
都有逆元；
④
有零元。