--- Hey, Mary, your backpack looks nice. When did you buy it. --- I ____ it for two weeks.
________ many times, but he still could not understand it.
Faced with a bill for $ 10,000,_________.
-----My room gets very cold at night. -----_________________.
At the end of the meeting, it was announced that an agreement ________.
----She looks happy. She _______ have passed the exam. -----I guess so. It is not difficult after all.