1\You'd better quit for the good of your health.Asmoke B smoking C to smoke D to smoking2\He said he free the next week.A will be B would be C was D had been3\When the fireman arrived,the fire put out.A has B had C was D had been
问题描述：
1\You'd better quit for the good of your health.Asmoke B smoking C to smoke D to smoking
2\He said he free the next week.A will be B would be C was D had been
3\When the fireman arrived,the fire put out.A has B had C was D had been
答
B
A
D
答
1B smoking
quit doing
2 B would be
句子是过去的.
3 D had been
过去的过去.