It was 1920 ______ regular radio broadcasts began.
#32553
A
while
B
when
C
that
D
since
推荐题目
He _______ his gun under the tree where he was __________.
#32988
A
lay; laying
B
laid; lying
C
lied; laying
D
lay; lying
A few people were killed in the fire, but _____ were saved.
#33787
A
the most
B
most of them
C
most of whom
D
most
—What do you think of it?—Well，it’s worth doing ________ the result is satisfactory.
#30224
A
the moment
B
as soon as
C
once
D
so long as
The young couple, who returned my lost wallet, left _______ I could ask for their names.
#29994
A
while
B
before
C
after
D
since
Could I speak to ________ is in charge of International Sales，please?
#29974
A
anyone
B
someone
C
whoever
D
no matter who