So difficult____it to work out the problem that I decided to ask Tom for advice.
| A．I did find | B．did I find | C．I have found | D．have I found |
The flowers were so lovely that they ______ in no time.
| A．sold | B．had been sold | C．were sold | D．would sell |
My cousin went to Canada two yours ago. He ______ there for a few months and then went to America.
| A．worked | B．would work | C．would be working | D．has been working |
—Look! He’s running so fast!
—Hard to______ his legs were once broken.
| A．know | B．imagine | C．realize | D．find |
—I’d like some more cheese.
—Sorry, there’s _____ left.
| A．some | B．a little | C．none | D．few |
I looked under _____ bed and found _____ book I lost last week.
| A．the; a | B．the: the | C．不填；the | D．the; 不填 |