We're {#blank#}1{#/blank#}.{#blank#}2{#/blank#} go！

I have a letter in my {#blank#}1{#/blank#} for you.

In the future, cars will probably use water or sun energy {#blank#}1{#/blank#} {#blank#}2{#/blank#} them.

I think he is{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} {#blank#}4{#/blank#} a college student.

What {#blank#}1{#/blank#} you {#blank#}2{#/blank#}  {#blank#}3{#/blank#} when you were five years old?

{#blank#}1{#/blank#}a pen and two books in the schoolbag.