–Let’s go for a walk, shall we?–OK, _______ I need to clean the dishes first.A. so B. and C. but
Aron water five days later.
This is______difficult problem that few students can work it out.
.He lives_______in the______village, but he is never_______.
Pollution is a serious problem. Scientists have _______ some good ways to save it.
We can’t put off _____ a plan .