A.No problem | B.I’d like to | C.Of course | D.Sure |
A.I am Tom | B.Tom is here | C.That’s Tom. Who are you? | D.This is Tom speaking |
A.a so useful book | B.such an useful book | C.a such useful book | D.so useful a book |
A.think | B.think about | C.like | D.like about |
A.It; that | B.There; that | C.There; whether | D.It; whether |
A.that | B.when | C.before | D.since |
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