meat, vegetables and otherfoods can easily be poisoned by microorganisms such as ______

rents are advised to _______regular contact withchildren through phone calls, emails, texts or video chats

I’m afraid I can’t return the book to you before Friday.—_______.

re anything I can do for you, sir—___________ But I’m being served

下列各句中加点词语使用恰当的一句是（ ）