I ________ work out the problem at first, but after my teacher showed me an example, I ________ get the answer easily.
| A．couldn’t; was able to | B．can’t; could |
| C．wasn’t able to; could | D．was able to; was able to |
Our friendship _____ quickly over the weeks that followed.
| A．had developed | B．was developing | C．would develop | D．developed |
—Have you heard about that fire in the market?
— Yes, fortunately no one _____.
| A．hurt | B．was hurt | C．has hurt | D．had been hurt |
Many people have donated that type of blood; however, the blood bank needs _____.
| A．some | B．less | C．much | D．more |
_______ with care, one tin will last for six weeks.
| A．Use | B．Using | C．Used | D．To use |
When deeply absorbed in work, ______ he often was，he would forget all about eating or sleeping.
| A．that | B．which | C．where | D．when |