Dr. Bethune began to work the _____ he arrived at the front.

-----Nancy is not coming tonight.----- But she _____!A．...

单项选择题-----Nancy is not coming tonight. ----- But she _____!

----- This pen isn’t yours, is it----- _____.A．Yes, it’...

单项选择题----- This pen isn’t yours, is it ----- _____.