The Russian rocket designer has died. For many years, he ______ as an important assistant to the father of Soviet space program.
#101576
A
serves
B
was serving
C
served
D
has served
推荐题目
If I were in a movie, then it would be about time that I ____my head in my hands for a cry.
#102066
A
bury
B
am burying
C
buried
D
would bury
After school we went to the reading-room to do some reading ,only to be told that it _______.
#99938
A
was decorated
B
had decorated
C
had been decorating
D
was being decorated
---- Where is your uncle’s home? ---- In New York. But he ______ in Boston for the past four years.
#104115
A
had lived
B
is living
C
lives
D
has lived
When I was in the countryside, I ____ by the riverside every day.
#101180
A
walked
B
was walking
C
walk
D
have walked