If you feel too tired while working, you’d better stop _______and have a rest.
A. work B. to work C. working
New York is one of ____ in the world.
| A．the large cities | B．the large city |
| C．the largest cities | D．the largest city |
Do you have difficulty ____ English?
| A．to learn | B．of learning | C．learning | D．learn |
—I don't know much about computer.
—I don't know, ________. Let's go and ask for help.
| A．also | B．either |
| C．too | D．as well |
—What 's wrong with you? -- It’s
| A．nothing serious | B．serious nothing |
| C．serious something | D．serious everything |
Ice-cream tastes _______, but it isn’t good ________ health.
| A．well , for | B．good ,for |
| C．well , with | D．good, with |