________ is difficult if you put your heart into it.

一 Hi, Jim! Is this your bike or Mary's?— It's mine, not         .

---Have you finished your work yet?　---No, not yet. I think it’ll take _____ ten minutes.

-- Coffee or tea?-- _______. Just a glass of water.

—Congratulations! Among the best pictures in the competition, I found _________. When did you draw it?—During the trip to the Yellow Mountain _________ May.