Only when___________ according to the directions can the medicine be quite effective.
| A．taking | B．taken | C．being taken | D．having been taken |
At first driving requires a lot of concentration, but over time, it just becomes_____.
| A．authentic | B．available | C．automatic | D．awake |
The dangerous building could fall down any time, but that’s a risk we’ll have to_____.
| A．do | B．take | C．perform | D．make |
I need to buy a new MP4 and cellphone badly but I can’t afford_____.
| A．one | B．that | C．it | D．the one |
I don't forget for ever how many years ago_____ was that I last met her in the coffee bar.
| A．this | B．it | C．which | D．when |
It was a(n) _____situation, because the restaurant was too expensive for us but we didn't want to just leave.
| A．amazing | B．curious | C．desperate | D．awkward |