—Shall we go for a drink at one o'clock this afternoon?
—________.Will two o'clock be OK?
| A．Sure，it's up to you | B．Sure，no problem |
| C．Sorry，I can't make it | D．Sorry，I'm not available today |
--- How much do I owe you for the meal?
--- _______. It’s nothing.
| A．You’re welcome | B．Forget it |
| C．With pleasure | D．That’s right |
Human beings are different from animals _______ 
they can use language as a tool to communicate.
| A．in that | B．for that | C．in which | D．for which |
______ is often the case with elder people, my grandma talked about my new hairstyle for at least 50 minutes nonstop.
| A．That | B．Which | C．As | D．It |
Eugene’s never willing to alter any of his opinions, so it’s no use ________ with him.
| A．to argue | B．arguing |
| C．argued | D．having argued |
Charlie ______ be really difficult at times even though he’s a nice person in general.
| A．shall | B．should | C．can | D．must |