Though many extra trains and buses are used to carry passengers, traffic tools are still ________ needed during the Spring Festival.
The place _______ the bridge is supposed to be built should be ________ the cross-river traffic is the heaviest.
---- The woman biologist stayed in Africa studying wild animals for 13 years before she returned.---- Oh, dear! She _______ a lot of difficulties!
In our childhood, we were often _______ by Grandma to pay attention to our table manners.
They _______ on the program for almost one week before I joined them, and now we ________ it as no good results have come out so far.
David has won the first prize in singing; he is still very excited now and feels________ desire to go to bed.