The first few years in the 21st century ______ the rapid rise of China as a world economic power.
| A．witness | B．has witnessed | C．will witness | D．have witnessed |
Neither the students nor the teacher__________here.Where are they?
| A．is | B．are | C．was | D．were |
Listen! Someone__________ in the next room.
| A．cry | B．is crying | C．are crying | D．crying |
There__________a table with three legs in Jenny’s room.
| A．is | B．are | C．has | D．have |
Neither of them__________a worker.
| A．am | B．are | C．is | D．were |
Our knowledge of computers__________growing all the time.
| A．be | B．is | C．are | D．were |