![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
Only after a year______ to see the results of my experiment.A.I beganB.I had begunC.have I
Only after a year______ to see the results of my experiment.
A.I began
B.I had begun
C.have I begun
D.did I begin
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
Only after a year______ to see the results of my experiment.
A.I began
B.I had begun
C.have I begun
D.did I begin
Only 11 people ______ the shipwreck.
A.survived after
B.survived through
C.were survived
D.survived
Only after they had performed hundreds of experiments did they succeed in (solve) ______the problem.
A.which
B.what
C.when
D.such
Only after the local customs department agrees, could you start your own business in the field of import and export.()
Not only() many cars built in the 1970s ugly and poorly designed, they also became very unreliable after 4050 thousand miles.
A. was
B. are
C. were
A.was
B.are
C.were
A.a scientist come to
B.was a scientist come to
C.a scientist did come to
D.did a scientist come to
A.ran into
B.went up
C.looked after
D.came to
Only after the students have mastered the rules of pronunciation _____.
A.can they memorize words more easily
B.when can they memorize words more easily
C.then they can memorize words more easily
D.when they can memorize words more easily
A.took on
B.took up
C.took off
D.took out