Customers _______ about the service should see the manager.
A.complain
B.to complain
C.to be complained
D.complaining

Electricity companies were criticized for failing to develop ______ energy sources.
A.tradition
B.limited
C.non-renewable
D.alternative

Trains ______ from this station take an hour to get to London.
A.leaving
B.to leave
C.left
D.leave

Choose the underlined part among A, B, C or D that needs correction.It was suggested that Sandro studies (A) the material more (B) thoroughly before attempting (C) to pass (D) the exam.
A.to pass (D)
B.studies (A)
C.attempting (C)
D.more (B)

When my father is (A) young, he used (B) to walk (C) a long distance, but now he is too old (D) to walk.
A.walk (C)
B.used (B)
C.too old (D)
D.is (A)

Your bag is possible (A) in (B) the car. I did not (C) see you take it along with (D) you.
A.possible (A)
B.in (B)
C.along with (D)
D.did not (C)

Clark is not only (A) a kind man who is always willing to help (B) people when they're in (C) troubles, he has a perfect masculine body as well (D).
A.not only (A)
B.in (C)
C.as well (D)
D.willing to help (B)

Their house was sold (A) three years ago actually belonged (B) to (C) us (D).
A.was sold (A)
B.to (C)
C.us (D)
D.belonged (B)

Increased consumption will lead to faster _______ of our natural resources.
A.exhaustion
B.exhaust
C.exhaustively
D.exhaustive

We should develop such _______ sources of energy as solar energy and nuclear energy.
A.surprising
B.revolutionary
C.alternative
D.tradition