He tried his best to solve the problem, _______difficult it was.
#68277
A
no matter
B
no matter how
C
whatever
D
although
推荐题目
I'd like to work with ______ is honest and easy to get on with．
#73954
A
who
B
whoever
C
whomever
D
no matter who
They made no effort to hide their amusement ________ I produced a packet of sweets from my pocket.
#73335
A
however
B
whatever
C
whichever
D
whenever
Generally speaking, nobody will work with _____ has a bad virtue.
#74055
A
no matter who
B
anyone
C
whomever
D
Whoever