______ it is raining hard , they are still working in the field.
| A．Because | B．As soon as | C．Though | D．Unless |
The houses in big cities are so expensive that I can’t __________ to buy one .
| A．afford | B．choose | C．decide | D．give |
A smile costs _________, but gives so much. So we should learn to smile.
| A．something | B．anything |
| C．nothing | D．everything |
My mother often tells me ______ the teachers carefully
| A．listen | B．listen to |
| C．to listen | D．to listen to |
Look, Jim _______ football on the playground.
| A．plays | B．was playing | C．play | D．is playing |