【单选题】【消耗次数：1】
That was so serious a matter that I had no choice but __________ the police.
①
called in
②
calling in
③
call in
④
to call in
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相关题目
【单选题】
I received his mother’ s telephone call at eleven. _____ that
he was badly hurt in an accident yesterday.
①
Then did I know
②
Only then I knew
③
Only then did I know
④
Only then knew I
【单选题】
_____the stress of examinations are over, we call all relax.
①
while
②
Even though
③
Now that
④
For
【单选题】
At midnight, he received a telephone call and was asked to meet at once.
①
mystery
②
mysterious
③
mystical
④
mythical
【单选题】
---Why didn’t John call me ? ---Oh, his cell-phone ran out of power, otherwise he______ you.
①
had called
②
would have called
③
called
④
would call
随机题目
【单选题】
气压传动性能上有许多优点，如下（ ）
①
空气作为介质，清洁费用低
②
气粘度小，管道压力损失小，便于集中供应和长距离输送
③
气压传动反应快，动作迅速
④
以上为正确答案
【单选题】
设A ={1，3，5，7}，B = {5, 7, 9，11}，则A∪B是（）
①
{1，3, 5}
②
{1,3，5，7}
③
{1, 3, 5, 7，9}
④
{1, 3, 5, 7，9, 11}