There are twenty people {#blank#}1{#/blank#} {#blank#}2{#/blank#} in the classroom.

例：If I were in your position，I would pay close attention.

→Were I in your position，I would pay close attention.

Not {#blank#}1{#/blank#} he {#blank#}2{#/blank#} to work {#blank#}3{#/blank#} he realize the importance of English.

The student was {#blank#}1{#/blank#} {#blank#}2{#/blank#} in the exam.

→Only{#blank#}1{#/blank#} discover that having strong motivation is one of the biggest factors in reaching goals.