【单选题】【消耗次数：1】
He was absent today ____________ he was hit by a car.
①
because
②
so
③
or
④
since
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相关题目
【单选题】
The reason __he was absent from the meeting was _his car broke down on the way.
①
that; because
②
why; that
③
that; that
④
for; that
【单选题】
Because he hadnt finished his assignment, so he continued working in the classroom. Is this a complete sentence?
①
Yes
②
No
【判断题】
It was because he was too clumsy to drive a car that Jim hadnt learned to drive.
①
正确
②
错误
【单选题】
It is____ me that he should be absent.
①
astonished at
②
astonishing to
③
surprised to
④
surprising at
【单选题】
He cannot ____ a car, for he does not earn much money.
①
obtain
②
afford
③
donate
④
consume
【单选题】
He is so shy that he ____ speaks in the public.
①
often
②
frequently
③
seldom
④
sometimes
【单选题】
His decision was ____, since he could not see the action
from where he was standing.
①
arbitrary
②
ordinary
③
casual
④
accurate
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Ever since he arrived, he has been complaining constantly about the weather.
①
正确
②
错误
【单选题】
He is late again today. I’ll ____ that he will not be late tomorrow.
①
refer to it
②
look to him
③
see to it
④
turn to it
随机题目
【单选题】
下列命题正确的是（）
①
{l，2}{{1，2}，{l，2，3}，1}
②
{1，2}{1，{l，2}，{l，2，3}，2}
③
{1，2}{{1}，{2}，{1，2}}
④
{1，2}∈{1，2，{2}，{l，2，3}}
【单选题】
下列集合对所给的二元运算封闭的是（ ）
①
正整数集上的减法运算
②
在正实数的集R+上规定为ab=ab-a-ba,b∈R+
③
正整数集Z+上的二元运算为xy=min(x,y)x,y∈Z+
④
全体n×n实可逆矩阵集合Rn×n上的矩阵加法
【单选题】
下列函数中为双射的是（ ）
①
f：Z→Z,f(j)=j(mod)
②
f：N→N,f(j)=
③
f：Z→N,f(j)=|2j|+1
④
f：R→R,f(r)=2r-15