__________ our earth, or else it will be no longer fit for us to live on.
| A．Protecting |
| B．To protect |
| C．Protect |
| D．Protected |
We left the meeting, there obviously __________ no point in staying.
| A．were | B．being | C．to be | D．having |
_________ expressing her love for you, my sister has also expressed mine.
| A．In | B．On | C．At | D．Beyond |
You’re watching TV? You’re ＿＿＿to be cleaning your own room.
| A．known | B．supposed | C．regarded | D．considered |
The design __________all the ages and social groups is not easy to make.
| A．appealed to | B．being appealed to |
| C．to be appealed to | D．appealing to |
It is fashionable to drive a car, but to drive a car is not nearly as difficult as it is imagined on condition that you ______ the specialized rules.
| A．give up | B．stick to | C．insist on | D．connect toT |