Even if you are an experienced teacher, you sometimes ____ make some mistakes.
A. can B. must 
. should D. will
【2015·江苏】—Why didn’t you invite John to your birthday party?
—Well, you know he’s _______ .
| A．an early bird | B．a wet blanket |
| C．a lucky dog | D．a tough nut |
【2015·江苏】—Jim, can you work this Sunday?
—________? I’ve been working for two weeks on end.
| A．Why me | B．Why no |
| C．What if | D．So what |
【2015·福建】—Hi, Dr Brown! I'm a little early. Should I wait outside?
—No. ______.
| A．That's right | B．My pleasure |
| C．Come on in | D．Take it easy |
【2015·陕西】—Sir, could I hand in my homework a bit late?
—_____, since you’ve been unwell these days.
| A．You can’t be serious | B．I’m afraid not |
| C．Good idea | D．Well, all right |
【2015·陕西】—Let’s go to the New Year’s Eve party, shall we?
—____，I guess it will be fun.
| A．Forget it! | B．No way! |
| C．Why not? | D．What for? |