—Is it that Jack often plays computer games    makes his parents worry about him ?—Yes , I think so .               
#85207
A
what
B
when
C
that
D
which
推荐题目
 It ________ we had stayed together for a couple of weeks ________ I found we had a lot in common.
#84689
A
was until; when
B
was until; that
C
was not until; when
D
was not until; that
 It was not until Susan came back ______her close friends were waiting for him. 
#84823
A
which she knew
B
which did she know
C
that she knew
D
that did she know