Swimming in the pool with the children ________ very interesting.
#44037
A
has
B
have
C
is
D
are
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Many a student  _____ that mistake before.
#86135
A
hasmade
B
havemade
C
hasbeenmade
D
hadmade
The watch and chain as well as the ring    of gold.
#85719
A
are made
B
were made
C
is made
D
was made
As we all know, the number of Tibetan antelopes(藏羚羊) ________ becoming ___________.
#43648
A
is; less and less
B
are; less and less
C
is; smaller and smaller
D
are; smaller and smaller