Travelers_______________ that they should bring their ID cards with them.
| A．have reminded | B．are reminded |
| C．were reminding | D．had been reminded |
________ is known to everybody, Taiwan is a part of China. We must unify it.
| A．It | B．As | C．Which | D．What |
The time is not far away ________ modern communications will become widespread in China’s vast countryside.
| A．as | B．when | C．until | D．before |
I hope that the little ________ I have been able to do does good to them all.
| A．which | B．what | C．that | D．when |
I hope that the little ________ I have been able to do does good to them all.
| A．which | B．what | C．that | D．when |
There are several research centers in China ________ a certain disease called Bird Flu is being studied.
| A．which | B．where | C．when | D．what |