Definition: If you cannot think straight, you are not thinking clearly about something. Level: C1
我太累了，脑子都转不过来了。
I was so exhausted that I ___could ___not ___think ___straight.
在工作上承受巨大压力时，她发现自己根本无法清晰地思考。
Under immense pressure at work, she finds she simply could ___not ___think ___straight.
熬了一夜之后，他无法清晰地思考。
After a sleepless night, he can ___not ___think ___straight.
