单项选择（每题1分）In his letter was his promise _____ he would spend the Christmas Eve with me.
#70344
A
that
B
what
C
which
D
whether
推荐题目
After entering university, we will reach a point in our studies _________we need to decide how to arrange our timetable efficiently and independently.
#69501
A
that
B
what
C
which
D
where
What especially impressed us was the way_____the girl studied foreign languages.
#73705
A
不填
B
which
C
by which
D
how
It is not always easy for the public to see _______ benefit a new invention can be of to human life.
#68436
A
whose
B
what
C
which
D
that