I'm afraid this painting is not by Picasso. It's only a copy and so it's _____.
| A．priceless | B．invaluable | C．unworthy | D．worthless |
．— I’m not good at singing, you know．
— _____．It’s just for fun．
| A．All right | B．No problem | C．Come on | D．Cheer up |
．— Shall we attend the concert this evening?
— Great idea, _____ we can do some shopping first．
| A．if | B．before | C．since | D．when |
Under no circumstances _____ that I would meet so many problems when I decided to take the job．
| A．do I expected | B．have I expected | C．I expected | D．did I expect |
They wouldn’t agree to sell the house to us at the same price_____ they had promised, _____ was rather disappointing．
| A．which ; as | B．as ; that | C．as ; which | D．that ; that |
—Sorry，Mum, I lost my key to the bicycle again．
—Oh! How_____ you be so careless! You have to learn to look after your belongings．
| A．can | B．may | C．will | D．dare |