问题
选择题
He tried his best to solve the problem, ______ difficult it was.
A．however
B．no matter
C．whatever
D．although
答案
答案：A
四个选项分别表示然而可是、不论怎样、无论什么和尽管，根据题意选A，他尽了最大努力解决问题，可是困难依旧。
搜题请搜索小程序“爱下问搜题”
He tried his best to solve the problem, ______ difficult it was.
A．however
B．no matter
C．whatever
D．although
答案：A
四个选项分别表示然而可是、不论怎样、无论什么和尽管，根据题意选A，他尽了最大努力解决问题，可是困难依旧。