—A ruler is 2 dollars and a pen is 3 dollars. How much are they? —They are ________.
The girl is so excellent that you ________ praise her too much.
— What do you think of the book?— Oh, excellent. It is worth ________ a second time.
— How is your English study? — Not bad. But I ________ learning English grammar.
If you successfully complete a difficult task ________ hard work, you’ll become confident.
—Do you like Chinese food or Western food , my dear? —_____ I have been away for so long, I ________ Chinese food, of course