Subway Line 4， into use in September 2009，has made traveling in Beijing easier．
| A．having been put | B．putting | C．being put | D．put |
My parents want me to take ______ maths lessons at the weekend, but I want to relax myself.
| A．extra | B．average | C．free | D．fond |
The pictures made me think of the days _____ we spent in Beijing.
| A．that | B．when | C．what | D．where |
I thought _______ necessary ______ him to tell his father everything.
| A．it; of | B．that; for | C．that; of | D．it; for |
Children who are not active or _____ diet is high in fat will gain weight quickly.
| A．what | B．who | C．whose | D．that |
Although it was really a difficult task, he decided to try his best to _______ success.
| A．challenge | B．host | C．approve | D．achieve |