—When did your brother begin to show his interest in medicine.—It was a Saturday _____ he noticed his classmate experimenting on a frog in the lab.
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that
B
what
C
when
D
which
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University graduates should develop such skills as critical thinking, and inter-personal communication, ________ are important in personal development.
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A
which are believed by the manager that
B
which are believed by the manager
C
which the manager believes that
D
which the manager believes
I admire my English teacher. I can remember very few occasions ________ she stopped working because of ill health.
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that
B
when
C
where
D
which
.----I can’t find Jack. Where did you see him this morning?----It was in his factory _______he worked.
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where
B
which
C
that
D
on which
Actually you can make learning English a process, ________ you can not only learn much knowledge but also interesting cultures.
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A
which
B
where
C
when
D
what