It seems that this method is (effective) ____than the previous one.(201412)
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Researchers found several important (different) ____in the way boys and girls learn a foreign language.(201412)
It is hard (guess) ____what comments the manager will make on the design.(201506)
It is possible that we reach a long-term (agree) ____with the company.(201506)
I must admit that the situation is (difficult) ____than I thought it would be.(201506)