Not until they {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} the moving train {#blank#}4{#/blank#} the Tibetan antelopes {#blank#}5{#/blank#} {#blank#}6{#/blank#} their movement across the railway.

①I {#blank#}1{#/blank#}she was a famous scientist {#blank#}2{#/blank#}she took off her dark glasses.(陈述句) 

②{#blank#}3{#/blank#} {#blank#}4{#/blank#}she took off her dark glasses             she was a famous scientist.(倒装句) 

③{#blank#}5{#/blank#}she took off her dark glasses {#blank#}6{#/blank#}she was a famous scientist.(强调句)