—Why are most of us unable to study English well，Mr.Li?—You ______.But you ______ too little attention to it.

 ---Mr. Smith, ______ he have all these letters typed for you right away?---He ______. They should be ready by 10 o’clock this morning.

—“What courses are you going to take next semester if you want to receive enough credits to get your degree?”—“I don’t know. But it’s about time      on something.”

 One of the requirements for the experiment is that the material _____ to its burning temperature．

From what I learn about their hotel, the service and the weather, they    their holiday very much.