Don’t pretend _____.Look!You are holding your English book upside down.
| A．to read | B．to have read | C．to be reading | D．reading |
23．I had reached a point in my career _____ I needed to decide which way to go．
| A．why | B．which | C．when | D．Where |
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 |