---Do you know what presents they will buy for our teachers on Teachers' Day?---No, they keep the secret to __________.
---What’s that? ---It’s an______________.(下列选项哪个不对)
—Let’s play soccer. —. A、Yes, it is B、Are you OK? C、That sounds boring
orange is on the table. A、An B、A C、Some
—Are those your tapes? —. A、Yes, those are B、No, it isn’t C、No, they aren’t
—Where are her pencils? —under the chair. A、It’s B、They’re C、These are