The young man ___ the bike was so ___ that he had an accident.
| A．by, careless | B．by, careful | C．on, careless | D．on, careful |
—_______does he go shopping? — Twice a week.
A. How often B. How C. How long
There will be _____ jobs for people in the future, because more robots will do the same jobs as people.
A. many B. less C. fewer
Why not ______ the old women? They need us.
| A．help | B．helping | C．to help | D．helped |
Sarah always makes her son _______ his hands before eating.
| A．wash | B．washing | C．to wash | D．washes |
Granny often asked us _______ water in our daily life.
| A．save | B．saving | C．to save | D．saved |