根据句子意思，用括号中所给单词的适当形式填空。
The time is too short．It’s ________(possible)for Daniel to finish this work．
David took a lot of ________(photo)in Mochou Lake Park last weekend．
Tree－planting Day is on the ________(twelve)of March every year．
Children should speak to old people ________(polite)．
根据句意，用括号内所给动词的正确形式填空
Yesterday, she ________(make)to finish all the work in a short time by his boss．
She tells her son to have his hair ________(cut)every other month．
－I'm sorry I forgot ________(post)your letter on my way home．
－That's OK．I will do it myself this afternoon．
When I got home, I found my pet dog ________(lie)on the floor, dead．
They ________(chat)online when Amy came up the stairs．
根据句意，用括号内所给单词的适当形式填空
There are three ________(knife)on the table．