下列不含通假字的一项是（ ）

Be careful not to drop it; it’s very ______.

I hope you don’t mind my sitting here.— _________. It’s for Mr. Friend.

When I talked with my grandma on the phone, she sounded weak, but by the time we ________up, her voice had been full of life

“ Isn’t that Tom playing basketball” “ It______ be; he fell off the ladder yesterday and got badly hurt”