1). When there is something (serious) ________ wrong, people usually expect an apology. 2). The workers in the factory demanded that their pay should (raise) ________ by 20 percent. 3). My (person) _________ view is that the price they offer is quite competitive. 4). It seems that this method is (effective) ________ than the previous one. 5). Researchers found several important (different) ________ in the way boys and girls learn a foreign language.