Hesaidthatthegroup________himaletterandaskedhimtogothereforaninterview.
A、havewrittenB
“写信给他”应该发生在他说话之前，也就是过去的过去，用过去完成时。
Thereisadeadlock(僵局)inthediscussionwhenneithersidegives________totheother.
Fromthesociolinguisticperspective,aspeechvarietyisnomorethanadialectalvarietyofalanguage.
Hesaidthatthegroup________himaletterandaskedhimtogothereforaninterview.
Thisisanimportantproblem_______toofewsocialscientistshaveresearched.
By"languageacquisitionisprimarilytheacquistionofthegrammaticalsystemoflanguage",linguistsmeanthat______.
