Mark the letter A, B, C or D to show the underlined part that needs correction.
Please arrive early so that we were able to start the meeting on time.
A.early
B.so that
C.were able
D.on time.

(45)..................
A.planning
B.preparing
C.practising
D.organising

(44).....................
A.insist
B.wait
C.ask
D.expect

(43)...................
A.native
B.resident
C.local
D.national

(42)....................
A.soon   
B.far      
C.well
D.long

(41) .....................
A.occupy
B.work
C.employ
D.staff

(40).......................
A.function
B.use
C.aim     
D.purpose

(39)..................
A.to
B.for
C.at
D.in

Why does the author mention tsunamis in the passage? 
A.To explain that not all tides are caused by gravity.
B.To give an example of an extreme tidal phenomenon.
C.C. To show that they are not related to natural tides.
D.To suggest that more categories for tides area needed.

The word exerts in paragraph 2 is closet in meaning to
A.mixes with
B.bring into use
C.infers from
D.connects with