{#blank#}1{#/blank#} to parents' {#blank#}2{#/blank#} their children can gain great success in their study.

Hangzhou {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} the West Lake in the world.

→My grandfather never left his hometown in his youth,{#blank#}1{#/blank#} {#blank#}2{#/blank#}travelled abroad.

→{#blank#}1{#/blank#} will have one of those periods when things seem to be going wrong. (用it作形式主语)

→{#blank#}1{#/blank#} his talk than he was surrounded by all the workers.