Both of the rules are broken. I want to buy a ______ one.
| A．three | B．third | C．forth | D．/ |
22．Here are some new computer programs _____ for home buildings．
| A．designing | B．design | C．to design | D．Designed |
21．_______ sweet and fresh, this kind of food is so popular with local people and the tourists．
| A．Smell | B．Smelling | C．To smell | D．Smelt |
20．Always read the label ______ you wash your clothes．
| A．before | B．unless | C．since | D．Until |
18．T appreciate that it's not easy for you, but you ______ try to get here on time．
| A．may | B．must | C．will | D．Can |
17．—Sorry we're late．We ______ the wrong turning．
—That's all right．Come in, please．
| A．take | B．have taken | C．took | D．had taken |