John was cleaning the window and Mary was watching TV.
#33577
A
at the meantime
B
when
C
meanwhile
D
while
推荐题目
This college allows students to develop their own interests, to ______ extent they wished.
#31858
A
whoever
B
whatever
C
however
D
whenever
David knocked at the door for nearly half an hour______Mary opened it, unwilling.
#30820
A
when
B
while
C
until
D
before