When he was alive, the old scientist used to say that knowledge ＿＿＿＿from practice and he gained his experience by doing a lot of practical work.
#104636
A
was coming
B
had come
C
comes
D
would come
推荐题目
Space exploration began in the 1960s, and since then about five hundred people into space.
#101989
A
have traveled
B
traveled
C
had traveled
D
are traveling
Whatever may happen, go on until you succeed, and you _______ what life is all about.
#102853
A
will know
B
know
C
have known
D
will have known
We must give up the project now. We _____ money.
#101247
A
are running out of
B
will run out of
C
had run out of
D
have run out of
They each other for 5 years.
#103960
A
have been in love with
B
have fallen in love with
C
are in love with
D
fell in love with
After the examination，my teacher told me that failure _______the mother of success.
#102951
A
was
B
is
C
be
D
been