The problem was so complicated that Mr. Smith had to______his brains.A．crackB．checkC．rackD

The problem was so complicated that Mr. Smith had to______his brains.

A．crack

B．check

C．rack

D．block

请帮忙给出正确答案和分析，谢谢！

您可能感兴趣的试题

The problem was so serious that the general manager had to take______ himself to solve it.

答案解析
What was the problem with the original mobile？A．It was made of aluminum.B．It wasn"t large

答案解析
What he said was so complicated that I _________ after the first couple ofsentences.

答案解析
At the meeting there was a hot argument and so many problems were left______.A．to solveB．s

答案解析
Everyone was tired, so Bill got up and made a motion that the remaining problems ______unt

答案解析
The complicated problem can be solved by the computer within__________ a few seconds

答案解析
______ gathering and storing information the computer can also solve complicated problems

答案解析