—We’ll make a trip to Hainan Island next weekend. Will you go with us?—No, I can’t _____ it at present.
There are _____ months in a year._____ month is December.
—Can your friend sing?--______.
Do you have a pen?I want _____ a letter.
—______ is the ruler? —______ two dollars.
We have six _____ .So we can know the time.