They had a difficult time too drive last year.A、learning B、learnt C、to learn
We don’t have enough nurses to look after the patients. At last ________ are needed.
______ one-hour documentary takes _______ close look at the life of giant pandas in Wolong.
Could you please give some ______ to the ______ teachers ?
______ little water is not enough for _______ many birds. ______ little birds don’t have______ much.
Are you planning to go to the _______ concert tonight ?