Great attention must be paid __________ welfare, especially in the poor area.
| A．develop | B．to develop |
| C．to developing | D．developing |
If you_______ smoke, please go outside.
| A．can | B．should |
| C．must | D．may |
Every means _________tried but without any result.
| A．have been | B．has been |
| C．are to be | D．is to be |
Do you wake up every morning __________ energetic and ready to start a new day?
| A．feel | B．to feel |
| C．feeling | D．felt |
We must keep in mind the fact __________ China is still a developing country.
| A．whether | B．that |
| C．why | D．when |
My brother _________while he ________his bicycle and hurt himself.
| A．fell; was riding | B．fell; were riding |
| C．had fallen; rode | D．had fallen; was riding |