Have you ever been to Shanghai？
Of course． Actually， I _________there for six years but now I live in Taizhou．（ ）
A．workedB．was working
C．would workD．have worked
Mum， why do I have to wash hands so many times a day？
For your health， you______be too careful．（ ）
A．can'tB．shouldn'tC．mustn'tD．needn't
I don't care how many words there are in your article， but the_____of it really matters．（ ）
A．abilityB．sizeC．qualityD．energy
The doctors and nurses managed_____the lives of patients， though they didn't have enough medicine．（ ）
A．saveB．savingC．to saveD．to saving
I don't really like big cities．
Neither do I． I feel much_____in the countryside．（ ）
A．freeB．freerC．freestD．the freest
Wow， you've made so much progress in drawing．
Thanks． I______two online courses this winter holiday．（ ）
A．tookB．will takeC．takeD．was taking