A.One by one time | B.One for each time | C.Each at one time | D.One at a time |
A.this | B.that | C.it | D.one |
A.this | B.that | C.it | D.what |
A.what | B.that | C.how | D.Whether |
A.that | B.what | C.which | D.It |
A.who | B.that | C.how | D.what |
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