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用所给词的适当形式填空21.Thenumberofourclass________(be)62,andanumberofthestudents_______(be)boys.2.The___________(office)languagesinCanadaareEnglishandFrench.3.It’simportantforus_______(understand)eachother.4.EnglandandGermanyare_________(Europe)countries.5.Frenchisalittlehard_________(learn).6.Morethanonegirl________(have)beentoShanghai.7.Canadawelcomes__________(culture)differencesinthepeoplewholivethere.8.Somestudentsaredancing,therest________(be)singing.