Do you know ________
| A．what is this used for | B．what this is used for |
| C．which this is used | D．that this is used for |
London's road traffic map is like a cobweb(蜘蛛网) of small streets, offering drivers more _______ when one road is blocked.
| A．barriers | B．characters | C．similarities | D．alternatives |
We need some more facts and figures ______ we make the final decision.
| A．since | B．before | C．after | D．until |
Not until he went through real hardship _____ the love we have for our families is important.
| A．had he realized | B．did he realize | C．he realized | D．he had realized |
This is not a typical summer camp, but Michelle is glad she _______ it.
| A．came down with | B．signed up for | C．got away from | D．did away with |
______ into many languages, the book is popular in many countries.
| A．Being translated | B．Having translated |
| C．To be translated | D．Having been translated |