The demand for _____ skilled workers is still increasing.
| A．high | B．higher |
| C．highly | D．more highly |
—Jane wasn’t in when Jack came,was she?
—_________,but she returned a few minutes later.
| A．No,she was | B．No,she wasn’t | C．Yes,she was | D．Yes,she wasn’t |
.All _________is a continuous supply of the basic necessities of life.
| A．what is needed | B．for our needs |
| C．the thing needed | D．that is needed |
Health experts in many countries still _________ their ideas about the relationships between our food and our health.
| A．have tested | B．tested | C．are testing | D．test |
—Can I help you,sir?
—Yes,I bought this radio here yesterday,but it_________.
| A．didn’t work | B．won’t work |
| C．can’t work | D．doesn’t work |
The last time I _________ her,she _________at a medical college.
| A．was visiting;studied | B．visited;studied |
| C．visited;was studying | D．was visiting;was studying |