Hebecameasuccessfulactor________hisfatherneverwas.
By"languageacquisitionisprimarilytheacquistionofthegrammaticalsystemoflanguage",linguistsmeanthat______.
She________everythingelseandconcentratedonthetaskbeforeher.
Iappreciate________(give)theopportunitytostudyabroadthreeyearsago.
Ithinkhisfailureintheexperimentresulted________hiscarelessness.
