ôn ngoại ngữ

Front

“How many pages............... so far?”

Back

have you studied

Front

We are too late. The plane ............... off ten minutes ago

Back

took

Front

“What a lovely boat!” “I ...............half a year building this boat.”

Back

spent

Front

How ............since we ............school?

Back

have you been/ left

Front

I think John ..............tomorrow.

Back

c