Listen! I hear someone________ the door.
---He is an honest person , so what he said is _______. A, knowledgeable B, valuable C, comfortable D, believable
______ it is raining hard , they are still working in the field.
The houses in big cities are so expensive that I can’t __________ to buy one .
.A smile costs _________, but gives so much. So we should learn to smile. A. something B. anything . nothing D. Everything
--- Is your teacher friendly ______you? --- Yes, he is very good ______us. A. to, to B. with , with C. to, with