Wind power is an ancient source of energy _____ we may return in the near future.
A. to which B. by which C. from which D. on which
Speaking of all the projects they have completed in recent years, we think this is probably the_______ one.
A. well-known B. better-known C. best-known D. most-known
I’m wondering in which play_______ your brother will appear? I’ve no idea of the information of the performance.
A. that is where B. this is when C. it is where D. it is that
Having lived in the town for quite a few years, I no longer felt ______ among the local people.
A. out of order B. out of place C. out of control D. out of question
_____ side of the street is lined with different shops, _____ of which sell electronic products.
A. Both; both B. Either; both C. Neither; either D. Either; all
Only when _____ possible to settle the problem how to get the machine repaired.
A. does the monitor come will it be B. the monitor comes will it be
C. has the monitor come it will be D. the monitor comes it will be
