A.worth
B.worthwhile
C.successful
D.successive
A.different
B.away
C.same
D.similar
A.a such
B.such one
C.one such
D.such as
After the first experiment, the scientists believed that______.
A.Rico could figure out the meanings of certain words
B.Rico could get clues from its owner during the experiment
C.Rico could calculate exactly
D.Rico was a faithful dog
A.so interesting
B.enough interesting
C.too interesting
D.interesting enough
A.talk with customers and suppliers
B.collect data on the Internet
C.observe what happens
D.do experiment
A.substantial
B.influential
C.beneficial
D.potential