A.further
B.critical
C.costly
D.global
A.a piece of newly-claimed land
B.a small island
C.a newly built dyke
D.a long canal
A.the sea is too rough
B.the land is lower than the sea
C.the dykes can not keep the floods out
D.the weather is too rough
A. were B. was C. has been D. is
A. is needed B. has needed C. are needed D. need
A. are, are B. are, is C. is, is D, is, are
A. has, have B. have, have C. has, has D. have, has
A. become B. has become C. becomes D. is becoming
A. have arrived B. are arriving C. had arrived D. has arrived
A. is B. are C. were D. be
A. have realized B. has realized C. have been realized D. has been realized
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