How many babies can a mother giant panda have ______?—One or two.[ ]

We have a lot of homework______. We are very busy today.

Can you sing this song in English? — Of course I can. It ______ often ______ by us kids.

John, _______ money is no problem, still leads a simple life.

Did you telephone Uncle Sam our plan for the Christmas holidays on his farm? — Yes, he was happy about our arrival, and he eagerly asked when ______.