A study shows that walking fast in your old age is a ______ that you will live a long life.
| A．sign | B．mark | C．symbol | D．signal |
The girl left home after quarreling with her parents, _____ them quite worried.
| A．making | B．made | C．to make | D．makes |
Not until ___to do my homework ____ how much time I had wasted playing computer games.
| A．I began; I realized |
| B．I began; did I realize |
| C．did I begin; I realized |
| D．did I begin; did I realize |
He has made another wonderful discovery, _____ I think is of great importance to science.
| A．which | B．what | C．when | D．that |
－What’s that terrible noise?
－The neighbours _____ the lawn.
| A．mow | B．are mowing | C．have mowed | D．will mow |
The man was determined to deal with the problem on his own and turned down ______ of help.
| A．invitations | B．offers | C．applications | D．comments |