With the development of production and science,radio a wide use in  a short time.
#103948
A
found
B
finds
C
have found
D
has found
推荐题目
I have to walk upstairs. The lift        down.
#103011
A
was breaking
B
broke
C
will break
D
has broken
--How long ___________ each other before they__________ married?--For about a year.
#104823
A
have they known;get
B
did they know; were going to get
C
do they know;are going to get
D
had they known; got
 —Could I use your car tomorrow morning?—Sure. I ________ a report at home.
#100107
A
will be writing
B
will have written
C
am writing
D
have written